期刊
EUROPEAN POLYMER JOURNAL
卷 48, 期 1, 页码 163-171出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2011.10.017
关键词
CBT; pCBT; Cyclic butylene terephthalate; In situ ring-opening polymerization; Chain extension; Toughening
资金
- Spanish Government [PSS-370000-2008-13]
Cyclic butylene terephthalate (CBT) was polymerized in the presence of a low molecular weight bifunctional epoxy resin. The resultant chain extended polymerized CBT (pCBT) showed an increased ductility compared to that of conventionally polymerized pCBT for all analyzed epoxy concentrations (1-4 wt.%). The best results were obtained with 2 wt.% of epoxy resin. Other mechanical properties remained relatively unaffected by the epoxy resin. H-1 NMR analysis suggested an esterification reaction of the carboxyl end groups of pCBT and the glycidyl functional groups of the diepoxide. With increasing epoxy content. the chain extended pCBT showed an increasing molecular weight and a decreasing glass transition. Crystallization and melting temperatures as well as crystallinity also decreased with increasing epoxy concentration. (C) 2011 Elsevier Ltd. All rights reserved.
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