Supercritical carbon dioxide‐induced melting temperature depression and crystallization of syndiotactic polypropylene
Identifieur interne : 000B53 ( Istex/Corpus ); précédent : 000B52; suivant : 000B54Supercritical carbon dioxide‐induced melting temperature depression and crystallization of syndiotactic polypropylene
Auteurs : Bin Li ; Xinyuan Zhu ; Guo-Hua Hu ; Tao Liu ; Guiping Cao ; Ling Zhao ; Weikang YuanSource :
- Polymer Engineering & Science [ 0032-3888 ] ; 2008-08.
English descriptors
- KwdEn :
- Amorphous phase, Conformation, Contract grant number, Contract grant sponsor, Crystalline phase, Crystallization, Different stabilities, Different temperatures, Different types, Differential scanning calorimeter, Diffraction peak, Ftir, Ftir results, Ftir spectra, Heating rate, Helical, Helical conformations, High temperature, Higher temperature, Infrared spectroscopy, Lower temperature, Macromolecule, Mesophase form, Molar volume, Other hand, Polym, Polymer, Polymer chains, Polymer engineering, Room temperature, Samples pretreated, Scco2, Scco2 treatment, Scco2 treatment time, Semicrystalline polymers, Small extent, Stable form, Structural changes, Supercritical carbon dioxide, Syndiotactic polypropylene, Temperature depression, Temperature peak, Transplanar, Transplanar conformation, Transplanar conformations, Transplanar form, Vacuum annealing, Vacuum oven, Various periods.
- Teeft :
- Amorphous phase, Conformation, Contract grant number, Contract grant sponsor, Crystalline phase, Crystallization, Different stabilities, Different temperatures, Different types, Differential scanning calorimeter, Diffraction peak, Ftir, Ftir results, Ftir spectra, Heating rate, Helical, Helical conformations, High temperature, Higher temperature, Infrared spectroscopy, Lower temperature, Macromolecule, Mesophase form, Molar volume, Other hand, Polym, Polymer, Polymer chains, Polymer engineering, Room temperature, Samples pretreated, Scco2, Scco2 treatment, Scco2 treatment time, Semicrystalline polymers, Small extent, Stable form, Structural changes, Supercritical carbon dioxide, Syndiotactic polypropylene, Temperature depression, Temperature peak, Transplanar, Transplanar conformation, Transplanar conformations, Transplanar form, Vacuum annealing, Vacuum oven, Various periods.
Abstract
This work was aimed at studying supercritical carbon dioxide (scCO2)‐induced melting temperature depression and crystallization of a syndiotactic polypropylene (sPP). Under scCO2, the melting temperature of the sPP could be significantly reduced depending on the CO2 pressure. The scCO2‐induced crystallization of sPP was investigated using differential scanning calorimeter (DSC) and Fourier transform infrared spectroscopy. Two melting peaks were observed in DSC. The one at lower melting temperature referred to the melting of the sPP crystals induced by scCO2 in its amorphous phase. Its location was shifted to higher temperature, and its area increased with increasing scCO2 treatment time, temperature, and pressure. The melting peak at higher temperature corresponded to the melting of the sPP crystals that already existed before scCO2 treatment. Its location and area remained almost unaffected by the scCO2 treatment. The scCO2‐induced crystallization was related to scCO2‐promoted transformation of the mesophase form III of the sPP to the stable form I. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers
Url:
DOI: 10.1002/pen.21137
Links to Exploration step
ISTEX:55A361CD707648AECBCEF8952879E9FF46653F14Le document en format XML
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sortKey="Hu, Guo Ua" sort="Hu, Guo Ua" uniqKey="Hu G" first="Guo-Hua" last="Hu">Guo-Hua Hu</name><affiliation><mods:affiliation>Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France</mods:affiliation></affiliation><affiliation><mods:affiliation>Institut Universitaire de France, Maison des Universités, 103 Boulevard Saint‐Michel, 75005 Paris, France</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: hu@ensic.inpl‐nancy.fr</mods:affiliation></affiliation><affiliation><mods:affiliation>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, FranceLing Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</mods:affiliation></affiliation></author><author><name sortKey="Liu, Tao" sort="Liu, Tao" uniqKey="Liu T" first="Tao" last="Liu">Tao 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Under scCO2, the melting temperature of the sPP could be significantly reduced depending on the CO2 pressure. The scCO2‐induced crystallization of sPP was investigated using differential scanning calorimeter (DSC) and Fourier transform infrared spectroscopy. Two melting peaks were observed in DSC. The one at lower melting temperature referred to the melting of the sPP crystals induced by scCO2 in its amorphous phase. Its location was shifted to higher temperature, and its area increased with increasing scCO2 treatment time, temperature, and pressure. The melting peak at higher temperature corresponded to the melting of the sPP crystals that already existed before scCO2 treatment. Its location and area remained almost unaffected by the scCO2 treatment. The scCO2‐induced crystallization was related to scCO2‐promoted transformation of the mesophase form III of the sPP to the stable form I. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>scco2</json:string><json:string>macromolecule</json:string><json:string>polym</json:string><json:string>polymer</json:string><json:string>scco2 treatment</json:string><json:string>ftir</json:string><json:string>transplanar</json:string><json:string>amorphous phase</json:string><json:string>helical</json:string><json:string>polymer engineering</json:string><json:string>temperature depression</json:string><json:string>higher temperature</json:string><json:string>different temperatures</json:string><json:string>heating rate</json:string><json:string>vacuum oven</json:string><json:string>stable form</json:string><json:string>molar volume</json:string><json:string>high temperature</json:string><json:string>crystallization</json:string><json:string>lower temperature</json:string><json:string>syndiotactic polypropylene</json:string><json:string>contract grant sponsor</json:string><json:string>ftir spectra</json:string><json:string>contract grant number</json:string><json:string>mesophase form</json:string><json:string>vacuum annealing</json:string><json:string>temperature peak</json:string><json:string>conformation</json:string><json:string>other hand</json:string><json:string>supercritical carbon dioxide</json:string><json:string>room temperature</json:string><json:string>transplanar conformations</json:string><json:string>helical conformations</json:string><json:string>various periods</json:string><json:string>transplanar form</json:string><json:string>small extent</json:string><json:string>transplanar conformation</json:string><json:string>samples pretreated</json:string><json:string>infrared spectroscopy</json:string><json:string>crystalline phase</json:string><json:string>polymer chains</json:string><json:string>scco2 treatment time</json:string><json:string>different stabilities</json:string><json:string>differential scanning calorimeter</json:string><json:string>different types</json:string><json:string>structural changes</json:string><json:string>ftir results</json:string><json:string>diffraction peak</json:string><json:string>semicrystalline polymers</json:string></teeft></keywords><author><json:item><name>Bin Li</name><affiliations><json:string>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</json:string><json:string>Current Address: Dow Chemical (China) Company Limited, 3/F No. 512 Yu Tang Road, Shanghai 201613, China</json:string></affiliations></json:item><json:item><name>Xinyuan Zhu</name><affiliations><json:string>Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China</json:string></affiliations></json:item><json:item><name>Guo‐Hua Hu</name><affiliations><json:string>Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France</json:string><json:string>Institut Universitaire de France, Maison des Universités, 103 Boulevard Saint‐Michel, 75005 Paris, France</json:string><json:string>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, FranceLing Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</json:string></affiliations></json:item><json:item><name>Tao Liu</name><affiliations><json:string>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</json:string></affiliations></json:item><json:item><name>Guiping Cao</name><affiliations><json:string>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</json:string></affiliations></json:item><json:item><name>Ling Zhao</name><affiliations><json:string>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</json:string><json:string>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, FranceLing Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</json:string></affiliations></json:item><json:item><name>Weikang Yuan</name><affiliations><json:string>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</json:string></affiliations></json:item></author><articleId><json:string>PEN21137</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>This work was aimed at studying supercritical carbon dioxide (scCO2)‐induced melting temperature depression and crystallization of a syndiotactic polypropylene (sPP). Under scCO2, the melting temperature of the sPP could be significantly reduced depending on the CO2 pressure. The scCO2‐induced crystallization of sPP was investigated using differential scanning calorimeter (DSC) and Fourier transform infrared spectroscopy. Two melting peaks were observed in DSC. The one at lower melting temperature referred to the melting of the sPP crystals induced by scCO2 in its amorphous phase. Its location was shifted to higher temperature, and its area increased with increasing scCO2 treatment time, temperature, and pressure. The melting peak at higher temperature corresponded to the melting of the sPP crystals that already existed before scCO2 treatment. Its location and area remained almost unaffected by the scCO2 treatment. The scCO2‐induced crystallization was related to scCO2‐promoted transformation of the mesophase form III of the sPP to the stable form I. POLYM. ENG. 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of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China<address><country key="CN"></country></address></affiliation><affiliation>Current Address: Dow Chemical (China) Company Limited, 3/F No. 512 Yu Tang Road, Shanghai 201613, China<address><country key="CN"></country></address></affiliation></author><author xml:id="author-0001"><persName><forename type="first">Xinyuan</forename><surname>Zhu</surname></persName><affiliation>Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China<address><country key="CN"></country></address></affiliation></author><author xml:id="author-0002" role="corresp"><persName><forename type="first">Guo‐Hua</forename><surname>Hu</surname></persName><email>hu@ensic.inpl‐nancy.fr</email><affiliation>Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France<address><country key="FR"></country></address></affiliation><affiliation>Institut Universitaire de France, Maison des Universités, 103 Boulevard Saint‐Michel, 75005 Paris, France<address><country key="FR"></country></address></affiliation><affiliation>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France Ling Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation></author><author xml:id="author-0003"><persName><forename type="first">Tao</forename><surname>Liu</surname></persName><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China<address><country key="CN"></country></address></affiliation></author><author xml:id="author-0004"><persName><forename type="first">Guiping</forename><surname>Cao</surname></persName><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China<address><country key="CN"></country></address></affiliation></author><author xml:id="author-0005" role="corresp"><persName><forename type="first">Ling</forename><surname>Zhao</surname></persName><email>zhaoling@ecust.edu.cn</email><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China<address><country key="CN"></country></address></affiliation><affiliation>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France Ling Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation></author><author xml:id="author-0006"><persName><forename type="first">Weikang</forename><surname>Yuan</surname></persName><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China<address><country key="CN"></country></address></affiliation></author><idno type="istex">55A361CD707648AECBCEF8952879E9FF46653F14</idno><idno type="ark">ark:/67375/WNG-89PB0VH5-X</idno><idno type="DOI">10.1002/pen.21137</idno><idno type="unit">PEN21137</idno><idno type="toTypesetVersion">file:PEN.PEN21137.pdf</idno></analytic><monogr><title level="j" type="main">Polymer Engineering & Science</title><title level="j" type="alt">POLYMER ENGINEERING AND SCIENCE</title><idno type="pISSN">0032-3888</idno><idno type="eISSN">1548-2634</idno><idno type="book-DOI">10.1002/(ISSN)1548-2634</idno><idno type="book-part-DOI">10.1002/pen.v48:8</idno><idno type="product">PEN</idno><imprint><biblScope unit="vol">48</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="1608">1608</biblScope><biblScope unit="page" to="1614">1614</biblScope><biblScope unit="page-count">7</biblScope><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2008-08"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract xml:lang="en" style="main"><head>Abstract</head><p>This work was aimed at studying supercritical carbon dioxide (scCO<hi rend="subscript">2</hi>)‐induced melting temperature depression and crystallization of a syndiotactic polypropylene (sPP). Under scCO<hi rend="subscript">2</hi>, the melting temperature of the sPP could be significantly reduced depending on the CO<hi rend="subscript">2</hi> pressure. The scCO<hi rend="subscript">2</hi>‐induced crystallization of sPP was investigated using differential scanning calorimeter (DSC) and Fourier transform infrared spectroscopy. Two melting peaks were observed in DSC. The one at lower melting temperature referred to the melting of the sPP crystals induced by scCO<hi rend="subscript">2</hi> in its amorphous phase. Its location was shifted to higher temperature, and its area increased with increasing scCO<hi rend="subscript">2</hi> treatment time, temperature, and pressure. The melting peak at higher temperature corresponded to the melting of the sPP crystals that already existed before scCO<hi rend="subscript">2</hi> treatment. Its location and area remained almost unaffected by the scCO<hi rend="subscript">2</hi> treatment. The scCO<hi rend="subscript">2</hi>‐induced crystallization was related to scCO<hi rend="subscript">2</hi>‐promoted transformation of the mesophase form III of the sPP to the stable form I. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers</p></abstract><textClass><keywords rend="articleCategory"><term>Article</term></keywords><keywords rend="tocHeading1"><term>Articles</term></keywords></textClass><langUsage><language ident="en"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/55A361CD707648AECBCEF8952879E9FF46653F14/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Wiley Subscription Services, Inc., A Wiley Company</publisherName><publisherLoc>Hoboken</publisherLoc></publisherInfo><doi 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type="articleCategory">Article</title><title type="tocHeading1">Articles</title></titleGroup><copyright ownership="thirdParty">Copyright © 2008 Society of Plastics Engineers</copyright><eventGroup><event type="publishedOnlineEarlyUnpaginated" date="2008-06-25"></event><event type="firstOnline" date="2008-06-25"></event><event type="publishedOnlineFinalForm" date="2008-07-08"></event><event type="xmlConverted" agent="Converter:JWSART34_TO_WML3G version:2.3.2 mode:FullText source:HeaderRef result:HeaderRef" date="2010-03-03"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-06"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-11-03"></event></eventGroup><numberingGroup><numbering type="pageFirst">1608</numbering><numbering type="pageLast">1614</numbering></numberingGroup><correspondenceTo><lineatedText><line>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France</line><line>Ling Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</line></lineatedText></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:PEN.PEN21137.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="11"></count><count type="tableTotal" number="1"></count><count type="referenceTotal" number="49"></count><count type="wordTotal" number="876"></count></countGroup><titleGroup><title type="main" xml:lang="en">Supercritical carbon dioxide‐induced melting temperature depression and crystallization of syndiotactic polypropylene</title></titleGroup><creators><creator xml:id="au1" creatorRole="author" affiliationRef="#af1" currentRef="#curr1"><personName><givenNames>Bin</givenNames><familyName>Li</familyName></personName></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#af2"><personName><givenNames>Xinyuan</givenNames><familyName>Zhu</familyName></personName></creator><creator xml:id="au3" creatorRole="author" affiliationRef="#af3 #af4" corresponding="yes"><personName><givenNames>Guo‐Hua</givenNames><familyName>Hu</familyName></personName><contactDetails><email normalForm="hu@ensic.inpl-nancy.fr">hu@ensic.inpl‐nancy.fr</email></contactDetails></creator><creator xml:id="au4" creatorRole="author" affiliationRef="#af1"><personName><givenNames>Tao</givenNames><familyName>Liu</familyName></personName></creator><creator xml:id="au5" creatorRole="author" affiliationRef="#af1"><personName><givenNames>Guiping</givenNames><familyName>Cao</familyName></personName></creator><creator xml:id="au6" creatorRole="author" affiliationRef="#af1" corresponding="yes"><personName><givenNames>Ling</givenNames><familyName>Zhao</familyName></personName><contactDetails><email>zhaoling@ecust.edu.cn</email></contactDetails></creator><creator xml:id="au7" creatorRole="author" affiliationRef="#af1"><personName><givenNames>Weikang</givenNames><familyName>Yuan</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="CN" type="organization"><unparsedAffiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</unparsedAffiliation></affiliation><affiliation xml:id="af2" countryCode="CN" type="organization"><unparsedAffiliation>Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China</unparsedAffiliation></affiliation><affiliation xml:id="af3" countryCode="FR" type="organization"><unparsedAffiliation>Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France</unparsedAffiliation></affiliation><affiliation xml:id="af4" countryCode="FR" type="organization"><unparsedAffiliation>Institut Universitaire de France, Maison des Universités, 103 Boulevard Saint‐Michel, 75005 Paris, France</unparsedAffiliation></affiliation><affiliation xml:id="curr1" countryCode="CN"><unparsedAffiliation>Dow Chemical (China) Company Limited, 3/F No. 512 Yu Tang Road, Shanghai 201613, China</unparsedAffiliation></affiliation></affiliationGroup><fundingInfo><fundingAgency>International Cooperation</fundingAgency><fundingNumber>2001CB711203</fundingNumber></fundingInfo><fundingInfo><fundingAgency>A Key Project from National Science Foundation of China for Multiscale Methodology</fundingAgency><fundingNumber>20490200</fundingNumber></fundingInfo><fundingInfo><fundingAgency>Nanotechnology Project from the Science and Technology Commission of Shanghai Municipality</fundingAgency><fundingNumber>0552nm039</fundingNumber></fundingInfo><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>This work was aimed at studying supercritical carbon dioxide (scCO<sub>2</sub>)‐induced melting temperature depression and crystallization of a syndiotactic polypropylene (sPP). Under scCO<sub>2</sub>, the melting temperature of the sPP could be significantly reduced depending on the CO<sub>2</sub> pressure. The scCO<sub>2</sub>‐induced crystallization of sPP was investigated using differential scanning calorimeter (DSC) and Fourier transform infrared spectroscopy. Two melting peaks were observed in DSC. The one at lower melting temperature referred to the melting of the sPP crystals induced by scCO<sub>2</sub> in its amorphous phase. Its location was shifted to higher temperature, and its area increased with increasing scCO<sub>2</sub> treatment time, temperature, and pressure. The melting peak at higher temperature corresponded to the melting of the sPP crystals that already existed before scCO<sub>2</sub> treatment. Its location and area remained almost unaffected by the scCO<sub>2</sub> treatment. The scCO<sub>2</sub>‐induced crystallization was related to scCO<sub>2</sub>‐promoted transformation of the mesophase form III of the sPP to the stable form I. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Supercritical carbon dioxide‐induced melting temperature depression and crystallization of syndiotactic polypropylene</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Supercritical carbon dioxide‐induced melting temperature depression and crystallization of syndiotactic polypropylene</title></titleInfo><name type="personal"><namePart type="given">Bin</namePart><namePart type="family">Li</namePart><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation><affiliation>Current Address: Dow Chemical (China) Company Limited, 3/F No. 512 Yu Tang Road, Shanghai 201613, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Xinyuan</namePart><namePart type="family">Zhu</namePart><affiliation>Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Guo‐Hua</namePart><namePart type="family">Hu</namePart><affiliation>Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France</affiliation><affiliation>Institut Universitaire de France, Maison des Universités, 103 Boulevard Saint‐Michel, 75005 Paris, France</affiliation><affiliation>E-mail: hu@ensic.inpl‐nancy.fr</affiliation><affiliation>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, FranceLing Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Tao</namePart><namePart type="family">Liu</namePart><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Guiping</namePart><namePart type="family">Cao</namePart><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ling</namePart><namePart type="family">Zhao</namePart><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation><affiliation>E-mail: zhaoling@ecust.edu.cn</affiliation><affiliation>Guo‐Hua Hu, Laboratory of Chemical Engineering Sciences, Nancy Université, CNRS‐ENSIC‐INPL, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, FranceLing Zhao, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Weikang</namePart><namePart type="family">Yuan</namePart><affiliation>State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</genre><originInfo><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><place><placeTerm type="text">Hoboken</placeTerm></place><dateIssued encoding="w3cdtf">2008-08</dateIssued><copyrightDate encoding="w3cdtf">2008</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><extent unit="figures">11</extent><extent unit="tables">1</extent><extent unit="references">49</extent><extent unit="words">876</extent></physicalDescription><abstract lang="en">This work was aimed at studying supercritical carbon dioxide (scCO2)‐induced melting temperature depression and crystallization of a syndiotactic polypropylene (sPP). Under scCO2, the melting temperature of the sPP could be significantly reduced depending on the CO2 pressure. The scCO2‐induced crystallization of sPP was investigated using differential scanning calorimeter (DSC) and Fourier transform infrared spectroscopy. Two melting peaks were observed in DSC. The one at lower melting temperature referred to the melting of the sPP crystals induced by scCO2 in its amorphous phase. Its location was shifted to higher temperature, and its area increased with increasing scCO2 treatment time, temperature, and pressure. The melting peak at higher temperature corresponded to the melting of the sPP crystals that already existed before scCO2 treatment. Its location and area remained almost unaffected by the scCO2 treatment. The scCO2‐induced crystallization was related to scCO2‐promoted transformation of the mesophase form III of the sPP to the stable form I. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers</abstract><note type="funding">International Cooperation - No. 2001CB711203; </note><note type="funding">A Key Project from National Science Foundation of China for Multiscale Methodology - No. 20490200; </note><note type="funding">Nanotechnology Project from the Science and Technology Commission of Shanghai Municipality - No. 0552nm039; </note><relatedItem type="host"><titleInfo><title>Polymer Engineering & Science</title></titleInfo><titleInfo type="abbreviated"><title>Polym Eng Sci</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><subject><genre>article-category</genre><topic>Article</topic></subject><identifier type="ISSN">0032-3888</identifier><identifier type="eISSN">1548-2634</identifier><identifier type="DOI">10.1002/(ISSN)1548-2634</identifier><identifier type="PublisherID">PEN</identifier><part><date>2008</date><detail type="volume"><caption>vol.</caption><number>48</number></detail><detail type="issue"><caption>no.</caption><number>8</number></detail><extent unit="pages"><start>1608</start><end>1614</end><total>7</total></extent></part></relatedItem><identifier type="istex">55A361CD707648AECBCEF8952879E9FF46653F14</identifier><identifier type="ark">ark:/67375/WNG-89PB0VH5-X</identifier><identifier type="DOI">10.1002/pen.21137</identifier><identifier type="ArticleID">PEN21137</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2008 Society of Plastics Engineers</accessCondition><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-L0C46X92-X">wiley</recordContentSource><recordOrigin>Wiley Subscription Services, Inc., A Wiley Company</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/55A361CD707648AECBCEF8952879E9FF46653F14/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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