Toughening of in situ polymerized cyclic butylene terephthalate by chain extension with a bifunctional epoxy resin

被引：38

作者：

Abt, Tobias ^{[1
]}

Sanchez-Soto, Miguel ^{[1
]}

Martinez de Ilarduya, Antxon ^{[2
]}

机构：

[1] Univ Politecn Cataluna, Dept Mat Sci, Ctr Catala Plast, Terrassa 08222, Spain

[2] Univ Politecn Cataluna, Dept Engn Quim, E-08028 Barcelona, Spain

来源：

EUROPEAN POLYMER JOURNAL | 2012年 / 48卷 / 01期

关键词：

CBT; pCBT; Cyclic butylene terephthalate; In situ ring-opening polymerization; Chain extension; Toughening; FIBER-REINFORCED COMPOSITES; POLY(BUTYLENE TEREPHTHALATE); MELTING BEHAVIOR; OLIGOMERS; CRYSTALLIZATION; BLENDS; PET; POLYESTERS; MATRIX; DSC;

D O I：

10.1016/j.eurpolymj.2011.10.017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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.

引用

页码：163 / 171

页数：9

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