Neutron reflection studies of phase separation and transesterification in thin film polymer blends

被引：5

作者：

Wong, APY ^{[1
]}

Karim, A ^{[1
]}

Han, CC ^{[1
]}

机构：

[1] NATL INST STAND & TECHNOL,DIV POLYMERS,GAITHERSBURG,MD 20814

来源：

PHYSICA B | 1996年 / 221卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(95)00941-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Neutron reflection is used to investigate the evolution of structure and surface segregation in thin films of a binary polymer blend, deuterated polymethamethacrylate (dPMMA) and polycarbonate (PC), This blend film simultaneously undergoes phase separation and reaction by trans-esterification. A large increase of the critical scattering length density in the first few minutes of annealing at 200 degrees C reflected the rapid layering of the dPMMA at the silicon surface. Further annealing progressively smeared out the specular peak in favor of the off-specular signal in the form of a butterfly pattern reflecting the in-plane anisotropy of the thin film phase separation.

引用

页码：301 / 305

页数：5

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