Composition effect on dewetting of ultrathin films of miscible polymer blend

被引：23
|
作者：
You, Jichun [1 ]
Hu, Shanshan [1 ]
Liao, Yonggui [2 ]
Song, Kaixu [1 ]
Men, Yongfeng [1 ]
Shi, Tongfei [1 ]
An, Lijia [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430074, Peoples R China
来源：
POLYMER | 2009年 / 50卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Composition fluctuation; Dewetting; Polymer blend; ADVANCED SCATTERING TECHNIQUE; ANGLE NEUTRON-SCATTERING; SURFACE PHASE-SEPARATION; X-RAY-SCATTERING; PATTERN-FORMATION; THIN-FILMS; FLUCTUATIONS; MORPHOLOGY; EVOLUTION; DYNAMICS;
D O I：
10.1016/j.polymer.2009.08.002
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Two kinds of dewetting and their transition induced by composition fluctuation due to different composition in blend [poly(methyl methacrylate) (PMMA) and poly(styrene-ran-acrylonitrile) (SAN)] films on SiOx substrate at 145 degrees C have been studied by in-situ atomic force microscopy (AFM). The results showed that morphology and pathway of dewetting depended crucially on the composition. Possible reason is the variation in intensity of composition fluctuation resulted from the change of components in polymer blend. Based on the discussion of this fluctuation due to the composition gradient, parameter of U-q0/E, which describes the initial amplitude of the surface undulation and original thickness of film respectively, has been employed to distinguish the morphologies of spontaneous dewetting including bicontinuous structures and holes. Prior to the investigation of dewetting, it is confirmed that this blend is miscible at 145 degrees C using grazing incidence ultra small-angle X-ray scattering (GIUSAX). (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4745 / 4752
页数：8
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