Dewetting and phase behaviors for ultrathin films of polymer blend

被引：27
|
作者：
Liao, YG [1 ]
Su, ZH [1 ]
Sun, ZY [1 ]
Shi, TF [1 ]
An, LJ [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2006年 / 27卷 / 05期
关键词：
annealing; dewetting; in situ AFM; phase separation; polymer blends; ultrathin films; wetting;
D O I：
10.1002/marc.200500736
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Dynamics of dewetting and phase separation in ultrathin films (thickness is ca. one radius of gyration, approximate to 1 R-g) of poly(methyl methacrylate) (PMMA) and poly(styrene-ran-acrylonitrile) (SAN) blends on Si substrate has been studied by in situ atomic force microscopy (AFM). In the miscible region, a "spinodal-like" dewetting driven by a composition fluctuation recently predicted by Wensink and Jerome (Langmuir 2002, 18, 413) occurs. In the two-phase region, the dewetting of the whole film is followed by phase separation in the droplets, coupling with the wetting of the substrate by the PMMA extracted by the strong attractive interaction between them.
引用
收藏
页码：351 / 355
页数：5
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