Synthesis, Characterization and Microstructure of New Liquid Poly(methylhydrosiloxanes) Containing Branching Units SiO4/2.
Identifieur interne : 000578 ( PubMed/Corpus ); précédent : 000577; suivant : 000579Synthesis, Characterization and Microstructure of New Liquid Poly(methylhydrosiloxanes) Containing Branching Units SiO4/2.
Auteurs : Jerzy J. Chru Ciel ; Marzena Fejdy ; Witold FortuniakSource :
- Polymers [ 2073-4360 ] ; 2018.
Abstract
Six liquid branched poly(methylhydrosiloxanes) of new random structures (PMHS-Q), containing quadruple branching units SiO4/2 (Q), both MeHSiO (DH) and Me₂SiO (D) chain building units (or only mers MeHSiO), and terminal groups Me₃SiO0.5 (M) were prepared by a hydrolytic polycondensation method of appropriate organic chlorosilanes and tetraethyl ortosilicate (TEOS), in diethyl ether medium at temperature below 0 °C. Volatile low molecular weight siloxanes were removed by a vacuum distillation at 150⁻155 °C. Yields of PMHS-Q reached from 55⁻69 wt%. Their dynamic viscosities were measured in the Brookfield HBDV+IIcP cone-plate viscometer and ranged from 10.7⁻13.1 cP. Molecular weights (MW) of PMHS-Q (Mn = 2440⁻6310 g/mol, Mw = 5750⁻10,350 g/mol) and polydispersities of MW (Mw/Mn = 2.0⁻2.8) were determined by a size exclusion chromatography (SEC). All polymers were characterized by FTIR, ¹H- and 29Si-NMR, and an elemental analysis. A microstructure of siloxane chains was proposed on a basis of 29Si-NMR results and compared with literature data.
DOI: 10.3390/polym10050484
PubMed: 30966518
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Chru Ciel</name><affiliation><nlm:affiliation>Textile Research Institute, Brzezińska Str. 5/15, 92-103 Łódź, Poland. jchrusci@p.lodz.pl.</nlm:affiliation></affiliation></author><author><name sortKey="Fejdy, Marzena" sort="Fejdy, Marzena" uniqKey="Fejdy M" first="Marzena" last="Fejdy">Marzena Fejdy</name><affiliation><nlm:affiliation>The Institute of Security Technologies "MORATEX", Marii Skłodowskiej-Curie Str. 3, 90-505 Łódź, Poland. mfejdys@moratex.eu.</nlm:affiliation></affiliation></author><author><name sortKey="Fortuniak, Witold" sort="Fortuniak, Witold" uniqKey="Fortuniak W" first="Witold" last="Fortuniak">Witold Fortuniak</name><affiliation><nlm:affiliation>Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza Str. 112, 90-363 Łódź, Poland. wfortuni@cbmm.lodz.pl.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2018">2018</date><idno type="RBID">pubmed:30966518</idno><idno type="pmid">30966518</idno><idno type="doi">10.3390/polym10050484</idno><idno type="wicri:Area/PubMed/Corpus">000578</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000578</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Synthesis, Characterization and Microstructure of New Liquid Poly(methylhydrosiloxanes) Containing Branching Units SiO<sub>4/2</sub>.</title><author><name sortKey="Chru Ciel, Jerzy J" sort="Chru Ciel, Jerzy J" uniqKey="Chru Ciel J" first="Jerzy J" last="Chru Ciel">Jerzy J. Chru Ciel</name><affiliation><nlm:affiliation>Textile Research Institute, Brzezińska Str. 5/15, 92-103 Łódź, Poland. jchrusci@p.lodz.pl.</nlm:affiliation></affiliation></author><author><name sortKey="Fejdy, Marzena" sort="Fejdy, Marzena" uniqKey="Fejdy M" first="Marzena" last="Fejdy">Marzena Fejdy</name><affiliation><nlm:affiliation>The Institute of Security Technologies "MORATEX", Marii Skłodowskiej-Curie Str. 3, 90-505 Łódź, Poland. mfejdys@moratex.eu.</nlm:affiliation></affiliation></author><author><name sortKey="Fortuniak, Witold" sort="Fortuniak, Witold" uniqKey="Fortuniak W" first="Witold" last="Fortuniak">Witold Fortuniak</name><affiliation><nlm:affiliation>Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza Str. 112, 90-363 Łódź, Poland. wfortuni@cbmm.lodz.pl.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Polymers</title><idno type="eISSN">2073-4360</idno><imprint><date when="2018" type="published">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Six liquid branched poly(methylhydrosiloxanes) of new random structures (PMHS-Q), containing quadruple branching units SiO<sub>4/2</sub> (Q), both MeHSiO (D<sup>H</sup>) and Me₂SiO (D) chain building units (or only mers MeHSiO), and terminal groups Me₃SiO<sub>0.5</sub> (M) were prepared by a hydrolytic polycondensation method of appropriate organic chlorosilanes and tetraethyl ortosilicate (TEOS), in diethyl ether medium at temperature below 0 °C. Volatile low molecular weight siloxanes were removed by a vacuum distillation at 150⁻155 °C. Yields of PMHS-Q reached from 55⁻69 wt%. Their dynamic viscosities were measured in the Brookfield HBDV+IIcP cone-plate viscometer and ranged from 10.7⁻13.1 cP. Molecular weights (MW) of PMHS-Q (M<sub>n</sub> = 2440⁻6310 g/mol, M<sub>w</sub> = 5750⁻10,350 g/mol) and polydispersities of MW (M<sub>w</sub>/M<sub>n</sub> = 2.0⁻2.8) were determined by a size exclusion chromatography (SEC). All polymers were characterized by FTIR, ¹H- and <sup>29</sup>Si-NMR, and an elemental analysis. A microstructure of siloxane chains was proposed on a basis of <sup>29</sup>Si-NMR results and compared with literature data.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">30966518</PMID><DateRevised><Year>2020</Year><Month>02</Month><Day>25</Day></DateRevised><Article PubModel="Electronic"><Journal><ISSN IssnType="Electronic">2073-4360</ISSN><JournalIssue CitedMedium="Internet"><Volume>10</Volume><Issue>5</Issue><PubDate><Year>2018</Year><Month>Apr</Month><Day>28</Day></PubDate></JournalIssue><Title>Polymers</Title><ISOAbbreviation>Polymers (Basel)</ISOAbbreviation></Journal><ArticleTitle>Synthesis, Characterization and Microstructure of New Liquid Poly(methylhydrosiloxanes) Containing Branching Units SiO<sub>4/2</sub>.</ArticleTitle><ELocationID EIdType="pii" ValidYN="Y">E484</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.3390/polym10050484</ELocationID><Abstract><AbstractText>Six liquid branched poly(methylhydrosiloxanes) of new random structures (PMHS-Q), containing quadruple branching units SiO<sub>4/2</sub> (Q), both MeHSiO (D<sup>H</sup>) and Me₂SiO (D) chain building units (or only mers MeHSiO), and terminal groups Me₃SiO<sub>0.5</sub> (M) were prepared by a hydrolytic polycondensation method of appropriate organic chlorosilanes and tetraethyl ortosilicate (TEOS), in diethyl ether medium at temperature below 0 °C. Volatile low molecular weight siloxanes were removed by a vacuum distillation at 150⁻155 °C. Yields of PMHS-Q reached from 55⁻69 wt%. Their dynamic viscosities were measured in the Brookfield HBDV+IIcP cone-plate viscometer and ranged from 10.7⁻13.1 cP. Molecular weights (MW) of PMHS-Q (M<sub>n</sub> = 2440⁻6310 g/mol, M<sub>w</sub> = 5750⁻10,350 g/mol) and polydispersities of MW (M<sub>w</sub>/M<sub>n</sub> = 2.0⁻2.8) were determined by a size exclusion chromatography (SEC). All polymers were characterized by FTIR, ¹H- and <sup>29</sup>Si-NMR, and an elemental analysis. A microstructure of siloxane chains was proposed on a basis of <sup>29</sup>Si-NMR results and compared with literature data.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Chruściel</LastName><ForeName>Jerzy J</ForeName><Initials>JJ</Initials><Identifier Source="ORCID">0000-0002-6227-9428</Identifier><AffiliationInfo><Affiliation>Textile Research Institute, Brzezińska Str. 5/15, 92-103 Łódź, Poland. jchrusci@p.lodz.pl.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fejdyś</LastName><ForeName>Marzena</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>The Institute of Security Technologies "MORATEX", Marii Skłodowskiej-Curie Str. 3, 90-505 Łódź, Poland. mfejdys@moratex.eu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fortuniak</LastName><ForeName>Witold</ForeName><Initials>W</Initials><Identifier Source="ORCID">0000-0002-4064-6944</Identifier><AffiliationInfo><Affiliation>Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza Str. 112, 90-363 Łódź, Poland. wfortuni@cbmm.lodz.pl.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>a grant Nr 3 T08E 053 30</GrantID><Agency>The Ministry of Science and Higher Education (Poland)</Agency><Country></Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2018</Year><Month>04</Month><Day>28</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>Polymers (Basel)</MedlineTA><NlmUniqueID>101545357</NlmUniqueID><ISSNLinking>2073-4360</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">29Si-NMR</Keyword><Keyword MajorTopicYN="N">hydrolytic polycondensation</Keyword><Keyword MajorTopicYN="N">hyperbranched poly(methylhydrosiloxanes)</Keyword><Keyword MajorTopicYN="N">topology of polysiloxane chains</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2018</Year><Month>03</Month><Day>28</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2018</Year><Month>04</Month><Day>25</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2018</Year><Month>04</Month><Day>25</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2019</Year><Month>4</Month><Day>11</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2019</Year><Month>4</Month><Day>11</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2019</Year><Month>4</Month><Day>11</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>epublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">30966518</ArticleId><ArticleId IdType="pii">polym10050484</ArticleId><ArticleId IdType="doi">10.3390/polym10050484</ArticleId><ArticleId IdType="pmc">PMC6415389</ArticleId></ArticleIdList><ReferenceList><Reference><Citation>Spectrochim Acta A Mol Biomol Spectrosc. 2011 Aug 15;79(4):749-57</Citation><ArticleIdList><ArticleId IdType="pubmed">21030292</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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