Relationship between sequence distribution and transesterification of PEN/PET random/block copolyesters

被引：47

作者：

Jun, HW ^{[1
]}

Chae, SH ^{[1
]}

Park, SS ^{[1
]}

Myung, HS ^{[1
]}

Im, SS ^{[1
]}

机构：

[1] Hanyang Univ, Grad Sch Adv Mat & Chem Engn, Dept Text Engn, Seoul 133179, South Korea

来源：

POLYMER | 1999年 / 40卷 / 06期

关键词：

PEN/PET random/block copolyesters; sequence distribution; transesterification;

D O I：

10.1016/S0032-3861(98)00374-7

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The random and block copolyesters of poly(ethylene 2,6 naphthalate) (PEN) and poly(ethylene terephthalate) (PET) are synthesized and studied by H-1-n.m.r., DSC, X-ray. The block length decreases and the degree of transesterification increases at a similar composition ratio. The melting point depressions occur with increasing the content of the other component, and melting peaks disappear at a similar composition ratio. The results of X-ray diffractograms match well with those of dyads fraction, block length, and DSC. It can be seen that a critical block length is needed for components in order to crystallize. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1473 / 1480

页数：8

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