Multiblock copolymers composed of poly(butylene succinate) and poly (1,2-propylene succinate): Effect of molar ratio of diisocyanate to polyester-diols on crosslink densities, thermal properties, mechanical properties and biodegradability

被引：37

作者：

Zheng, Liuchun ^{[1
,2
]}

Li, Chuncheng ^{[1
]}

Zhang, Dong ^{[1
]}

Guan, Guohu ^{[1
]}

Xiao, Yaonan ^{[1
]}

Wang, Dujin ^{[1
]}

机构：

[1] Chinese Acad Sci ICCAS, Beijing Natl Lab Mol Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 09期

基金：

国家高技术研究发展计划(863计划);

关键词：

Crosslink density; Poly(butylene succinate); Mechanical properties; Biodegradation; HYDROXYL-TERMINATED POLYBUTADIENE; PHYSICAL-PROPERTIES; POLY(ETHYLENE ADIPATE); ALIPHATIC COPOLYESTERS; ENZYMATIC DEGRADATION; NETWORK PARAMETERS; MOLECULAR-WEIGHT; CRYSTALLIZATION; TEREPHTHALATE); ACID;

D O I：

10.1016/j.polymdegradstab.2010.05.016

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In order to study the relationship between structure and properties, multiblock copolymers composed of poly(butylene succinate) (PBS) and poly (1,2-propylene succinate) (PPSu) have been synthesized by chain-extension at various molar ratios of hexamethylene diisocyanate (HDI) to polyester-diols, which have been abbreviated as R-values in this paper. Molecular weights of soluble fractions, gel fractions and crosslink densities have been determined. Thermal properties, mechanical properties and biodegradability have been studied and correlated with R-values. Crystallization of copolymers becomes difficult with increasing R-value. Tensile strength, flexural strength and flexural modulus tend to increase with increasing R-value up to 1.2, and vary little when R-value increases from 1.2 to 1.3, then decrease with further increase in R-value. Impact strength achieves a maximum value at R-value of 1.3. Biodegradation rate reaches a minimum value when R-value is 1.1. Biodegradation has been studied systematically by attenuated total reflectance Fourier transform infrared (ATR-FTIR), H-1, NMR and SEM. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1743 / 1750

页数：8

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