Mechanistic aspects of ester–carbonate exchange in polycarbonate/cycloaliphatic polyester with model reactions
Identifieur interne : 001781 ( Istex/Checkpoint ); précédent : 001780; suivant : 001782Mechanistic aspects of ester–carbonate exchange in polycarbonate/cycloaliphatic polyester with model reactions
Auteurs : M. Jayakannan [Inde] ; P. Anilkumar [Inde]Source :
- Journal of Polymer Science Part A: Polymer Chemistry [ 0887-624X ] ; 2004-08-15.
English descriptors
- Teeft :
- Acidolysis, Alcoholysis, Anilkumar, Appl, Appl polym, Aroh, Aromatic, Aromatic peaks, Aromatic protons, Bisphenol, Blend, Carbonate, Carbonate exchange, Carbonate exchange reaction, Carbonate exchange reactions, Catalyst, Cdcl3, Chda, Chdm, Chem, Clear solution, Coch3, Composition analysis, Cycloaliphatic, Decarboxylation, Dmcd, Ester, Ester linkages, Exchange reaction, Ftir, High temperatures, Identical conditions, Inherent viscosity, Jayakannan, Macromol, Macromol chem, Macromol chem phys, Macromolecule, Mechanistic aspects, Mmol, Model reactions, Molar, Molecular weight, Molecular weights, Odcb, Pccd, Phenol, Phenol ends, Phys, Polyester blends, Polym, Polym chem, Polym phys, Polymer, Polymer blends, Proton, Reactive, Resultant product, Titanium catalyst, Triad, Various amounts, Zhang.
Abstract
The reactive blending of bisphenol A polycarbonate (PC) with poly(1,4‐cyclohexanedimethylene‐1,4‐cyclohexanedicarboxylate) (PCCD) was investigated with a new high‐temperature solution‐blending methodology. The ester–carbonate exchange reaction (transesterification) in the blends was studied with NMR and Fourier transform infrared. The composition analysis of the PC/PCCD blends was performed with 1H NMR, and the molecular weights were determined with viscosity methods. 1,4‐Dimethylcyclohexanedicarboxylate, 1,4‐cyclohexanedicarboxylic acid, and 1,4‐cyclohexanedimethanol were reacted with PC to study the tendency of polyester chain‐end reactions such as transesterification, acidolysis, and alcoholysis. These model reactions revealed that the reactive blending was affected by both alcoholysis and transesterification, whereas acidolysis was absent. The model reaction products were used to study the mechanistic aspects of PC/PCCD reactive blending, which indicated the formation of three stable triads; two corresponded to symmetrical and unsymmetrical aromatic–cycloaliphatic esters, and the other corresponded to aromatic–cycloaliphatic ethers. The composition analysis confirmed that in PC/PCCD reactive blending, the exchange reaction predominantly occurred in the polymer main chains, and the influence of the end groups was insignificant. The effect of the catalyst concentration and PC/PCCD composition on the extent of the exchange reaction was also investigated. Thermal analysis by differential scanning calorimetry revealed that the ester–carbonate exchange enhanced the compatibilization of PC/PCCD, and a single glass‐transition temperature was observed for the miscible blends. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 3996–4008, 2004
The reactive blending of bisphenol A polycarbonate (PC) with poly(1,4‐cyclohexanedimethylene‐1,4‐cyclohexanedicarboxylate) (PCCD) was investigated with NMR and Fourier transform infrared spectroscopy. Model reactions were carried out through the reaction of PC with 1,4‐dimethylcyclohexanedicarboxylate, 1,4‐cyclohexanedicarboxylic acid, and 1,4‐cyclohexanedimethanol to study the tendency of polyester chain‐end reactions such as transesterification, acidolysis, and alcoholysis. These model reactions revealed that the reactive blending was affected by both alcoholysis and transesterification, whereas acidolysis was absent. NMR analysis confirmed that in PC/PCCD reactive blending, the exchange reaction predominantly occurred in the polymer main chains, and the influence of the end groups was insignificant.
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DOI: 10.1002/pola.20281
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Anilkumar</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:C9B814EC52ADB3A75F497F89A7B9C11020AD849C</idno><date when="2004" year="2004">2004</date><idno type="doi">10.1002/pola.20281</idno><idno type="url">https://api.istex.fr/ark:/67375/WNG-14W9MXS4-3/fulltext.pdf</idno><idno type="wicri:Area/Istex/Corpus">002F83</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002F83</idno><idno type="wicri:Area/Istex/Curation">002F44</idno><idno type="wicri:Area/Istex/Checkpoint">001781</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">001781</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Mechanistic aspects of ester–carbonate exchange in polycarbonate/cycloaliphatic polyester with model reactions</title><author><name sortKey="Jayakannan, M" sort="Jayakannan, M" uniqKey="Jayakannan M" first="M." last="Jayakannan">M. Jayakannan</name><affiliation wicri:level="1"><country xml:lang="fr">Inde</country><wicri:regionArea>Polymer Science Division, Regional Research Laboratory, Thiruvananthapuram 695019</wicri:regionArea><wicri:noRegion>Thiruvananthapuram 695019</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Inde</country></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Inde</country><wicri:regionArea>Correspondence address: Polymer Science Division, Regional Research Laboratory, Thiruvananthapuram 695019</wicri:regionArea><wicri:noRegion>Thiruvananthapuram 695019</wicri:noRegion></affiliation></author><author><name sortKey="Anilkumar, P" sort="Anilkumar, P" uniqKey="Anilkumar P" first="P." last="Anilkumar">P. Anilkumar</name><affiliation wicri:level="1"><country xml:lang="fr">Inde</country><wicri:regionArea>Polymer Science Division, Regional Research Laboratory, Thiruvananthapuram 695019</wicri:regionArea><wicri:noRegion>Thiruvananthapuram 695019</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Journal of Polymer Science Part A: Polymer Chemistry</title><title level="j" type="alt">JOURNAL OF POLYMER SCIENCE PART A: POLYMER CHEMISTRY</title><idno type="ISSN">0887-624X</idno><idno type="eISSN">1099-0518</idno><imprint><biblScope unit="vol">42</biblScope><biblScope unit="issue">16</biblScope><biblScope unit="page" from="3996">3996</biblScope><biblScope unit="page" to="4008">4008</biblScope><biblScope unit="page-count">13</biblScope><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2004-08-15">2004-08-15</date></imprint><idno type="ISSN">0887-624X</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0887-624X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Acidolysis</term><term>Alcoholysis</term><term>Anilkumar</term><term>Appl</term><term>Appl polym</term><term>Aroh</term><term>Aromatic</term><term>Aromatic peaks</term><term>Aromatic protons</term><term>Bisphenol</term><term>Blend</term><term>Carbonate</term><term>Carbonate exchange</term><term>Carbonate exchange reaction</term><term>Carbonate exchange reactions</term><term>Catalyst</term><term>Cdcl3</term><term>Chda</term><term>Chdm</term><term>Chem</term><term>Clear solution</term><term>Coch3</term><term>Composition analysis</term><term>Cycloaliphatic</term><term>Decarboxylation</term><term>Dmcd</term><term>Ester</term><term>Ester linkages</term><term>Exchange reaction</term><term>Ftir</term><term>High temperatures</term><term>Identical conditions</term><term>Inherent viscosity</term><term>Jayakannan</term><term>Macromol</term><term>Macromol chem</term><term>Macromol chem phys</term><term>Macromolecule</term><term>Mechanistic aspects</term><term>Mmol</term><term>Model reactions</term><term>Molar</term><term>Molecular weight</term><term>Molecular weights</term><term>Odcb</term><term>Pccd</term><term>Phenol</term><term>Phenol ends</term><term>Phys</term><term>Polyester blends</term><term>Polym</term><term>Polym chem</term><term>Polym phys</term><term>Polymer</term><term>Polymer blends</term><term>Proton</term><term>Reactive</term><term>Resultant product</term><term>Titanium catalyst</term><term>Triad</term><term>Various amounts</term><term>Zhang</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The reactive blending of bisphenol A polycarbonate (PC) with poly(1,4‐cyclohexanedimethylene‐1,4‐cyclohexanedicarboxylate) (PCCD) was investigated with a new high‐temperature solution‐blending methodology. The ester–carbonate exchange reaction (transesterification) in the blends was studied with NMR and Fourier transform infrared. The composition analysis of the PC/PCCD blends was performed with 1H NMR, and the molecular weights were determined with viscosity methods. 1,4‐Dimethylcyclohexanedicarboxylate, 1,4‐cyclohexanedicarboxylic acid, and 1,4‐cyclohexanedimethanol were reacted with PC to study the tendency of polyester chain‐end reactions such as transesterification, acidolysis, and alcoholysis. These model reactions revealed that the reactive blending was affected by both alcoholysis and transesterification, whereas acidolysis was absent. The model reaction products were used to study the mechanistic aspects of PC/PCCD reactive blending, which indicated the formation of three stable triads; two corresponded to symmetrical and unsymmetrical aromatic–cycloaliphatic esters, and the other corresponded to aromatic–cycloaliphatic ethers. The composition analysis confirmed that in PC/PCCD reactive blending, the exchange reaction predominantly occurred in the polymer main chains, and the influence of the end groups was insignificant. The effect of the catalyst concentration and PC/PCCD composition on the extent of the exchange reaction was also investigated. Thermal analysis by differential scanning calorimetry revealed that the ester–carbonate exchange enhanced the compatibilization of PC/PCCD, and a single glass‐transition temperature was observed for the miscible blends. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 3996–4008, 2004</div><div type="abstract" xml:lang="en">The reactive blending of bisphenol A polycarbonate (PC) with poly(1,4‐cyclohexanedimethylene‐1,4‐cyclohexanedicarboxylate) (PCCD) was investigated with NMR and Fourier transform infrared spectroscopy. Model reactions were carried out through the reaction of PC with 1,4‐dimethylcyclohexanedicarboxylate, 1,4‐cyclohexanedicarboxylic acid, and 1,4‐cyclohexanedimethanol to study the tendency of polyester chain‐end reactions such as transesterification, acidolysis, and alcoholysis. These model reactions revealed that the reactive blending was affected by both alcoholysis and transesterification, whereas acidolysis was absent. NMR analysis confirmed that in PC/PCCD reactive blending, the exchange reaction predominantly occurred in the polymer main chains, and the influence of the end groups was insignificant.</div></front></TEI><affiliations><list><country><li>Inde</li></country></list><tree><country name="Inde"><noRegion><name sortKey="Jayakannan, M" sort="Jayakannan, M" uniqKey="Jayakannan M" first="M." last="Jayakannan">M. Jayakannan</name></noRegion><name sortKey="Anilkumar, P" sort="Anilkumar, P" uniqKey="Anilkumar P" first="P." last="Anilkumar">P. Anilkumar</name><name sortKey="Jayakannan, M" sort="Jayakannan, M" uniqKey="Jayakannan M" first="M." last="Jayakannan">M. Jayakannan</name><name sortKey="Jayakannan, M" sort="Jayakannan, M" uniqKey="Jayakannan M" first="M." last="Jayakannan">M. Jayakannan</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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