Isothermal Crystallization Behavior of Biodegradable Poly (butylene succinate-co-terephthalate) (PBST) Copolyesters at High Undercoolings

被引：0
|
作者：
许新建 [1 ]
李发学 [1 ]
罗胜利 [1 ]
俞建勇 [1 ]
机构：
[1] College of Textiles,Donghua University
来源：
JournalofDonghuaUniversity(EnglishEdition) | 2008年 / 25卷 / 04期
关键词：
PBST copolyesters; DLI; isothermal crystallization; high undercoolings;
D O I：
10.19884/j.1672-5220.2008.04.010
中图分类号：
O631.3 [高聚物的化学性质];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(butylene succinate-co-terephthalate)(PBST)copolyesters were prepared by polycondensation.The isothermal crystallization behavior of the as-prepared copolyesters was investigated by depolarized light intensity(DLI)at high undercoolings.According to Avrami equation,the exponent n,independent of the crystallization temperature,is at a range of 2.5 to 3.4,which probably corresponds to the heterogeneous nucleation and a 3-dimensional spherulitic growth.The maximum crystallization rate,very useful to polymer processing,was found at about 90℃ based on the half-crystallization time t1/2analysis.
引用
收藏
页码：405 / 407
页数：3
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