STRESS-RELAXATION BEHAVIOR OF LOW EPOXIDIZED POLY(STYRENE-B-BUTADIENE-B-STYRENE) TRIBLOCK COPOLYMERS

被引：6
|
作者：
WU, GW [1 ]
HSIUE, GH [1 ]
YANG, JS [1 ]
机构：
[1] NATL TSING HUA UNIV,DEPT CHEM ENGN,HSINCHU 300,TAIWAN
来源：
MATERIALS CHEMISTRY AND PHYSICS | 1994年 / 39卷 / 01期
关键词：
STRESS RELAXATION; THERMOPLASTIC ELASTOMERS; OXIRANE; TRIBLOCK COPOLYMERS; EPOXIDIZED STYRENE-BUTADIENE COPOLYMERS;
D O I：
10.1016/0254-0584(94)90127-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The stress relaxation properties of low epoxidized poly(styrene-b-butadiene-b-styrene) (ESBS) triblock copolymers were investigated in this study via the stress-relaxation technique. The relaxation of the ESBS copolymers depend on the temperature and oxirane content. ESBS copolymers at low oxirane contents do not completely obey the common rule that the relaxation rate decreases with increasing epoxidization. ESBS with 1.9% oxirane has the largest relaxation rate constant. The relaxation activation energies of the ESBS copolymers with 0-2.4% oxirane were calculated to be about 85 kJ mol-1. ESBS with 1.9% oxirane has the lowest number of chains in stress for relaxation.
引用
收藏
页码：29 / 33
页数：5
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