Isothermal crystallization of poly(ε-caprolactone-ethylene glycol) block copolymers

被引：111
|
作者：
Bogdanov, B
Vidts, A
Schacht, E
Berghmans, H
机构：
[1] State Univ Ghent, Polymer Mat Res Grp, B-9000 Ghent, Belgium
[2] Katholieke Univ Leuven, Dept Macromol Chem, B-3001 Heverlee, Belgium
来源：
MACROMOLECULES | 1999年 / 32卷 / 03期
关键词：
D O I：
10.1021/ma980226a
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 isothermal crystallization of three different types of poly[epsilon-caprolactone-co-ethylene glycol] (PCL-PEG) incompatible block copolymers [A-B, (A)(2)-B, and A-B-A] was investigated using DSC. The PEG weight fraction in the copolymers was slightly varied From 18 to 22 wt%. It was established that the kinetic parameters from the Avrami equation (the half time of crystallization, tau(0.5), and the rate constant of overall crystallization, z) for the PCL constituent, which crystallizes first, are similar to the kinetic parameters of the corresponding homopolymer (PCL). The growth retardation of the constituent which crystallizes second (PEG block) is attributed to the mutual influence between the PEG constituent and the PCL crystal phase which fixes (hardened) the total copolymer structure.
引用
收藏
页码：726 / 731
页数：6
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