The block length effect of polystyrene-block-poly(methyl methacrylate) on the interfacial adhesion between polystyrene-poly(methyl methacrylate) and between polystyrene/phenoxy

被引：3
|
作者：
Cho, JC [1 ]
Kim, KH [1 ]
Jo, WH [1 ]
机构：
[1] SEOUL NATL UNIV,DEPT FIBER & POLYMER SCI,SEOUL 151742,SOUTH KOREA
来源：
POLYMER JOURNAL | 1996年 / 28卷 / 12期
关键词：
diblock copolymer; block length; interfacial adhesion; fracture mechanism; entanglement molecular weight;
D O I：
10.1295/polymj.28.1060
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 effect of the poly(methyl methacrylate) (PMMA) block length of polystyrene(PS)-poly(methyl methacrylate) diblock copolymer on the interfacial adhesion between PS/PMMA and between PS/phenoxy has been investigated. When the block copolymer with the PMMA block length of 6.6 kg mol(-1) is reinforced at the interfaces, the fracture behavior follows the pure chain pull-out mechanism, and the estimated monomer friction coefficient, f(mono), are 1.69 x 10(-11) and 3.42 x 10(-11) N/monomer for PS/PMMA and PS/phenoxy, respectively. The higher value of f(mono) in PS/phenoxy arises from the specific interaction between the PMMA block chain and phenoxy homopolymer. When the block copolymer with the PMMA block length greater than 10.9 kgmol(-1) is added to the interfaces, the fracture behavior of both PS/PMMA and PS/phenoxy follows the craze formation followed by the chain scission, indicating that the entanglement molecular weight of PMMA lies in between 6.6 kgmol(-1) and 10.9 kgmol(-1).
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页码：1060 / 1064
页数：5
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