Swelling Structure of Thin Poly(methyl methacrylate) Films in Various Alkyl Length Alcohols

被引：17

作者：

Atarashi, Hironori ^{[1
]}

Morita, Hiroshi ^{[2
]}

Yamazaki, Dai ^{[3
]}

Hino, Masahiro ^{[4
]}

Nagamura, Toshihiko ^{[1
]}

Tanaka, Keiji ^{[1
]}

机构：

[1] Kyushu Univ, Dept Appl Chem, Fukuoka 8190395, Japan

[2] Natl Inst Adv Ind Sci & Technol, Nanotechnol Res Inst, Tsukuba 3058568, Japan

[3] Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Ibaraki 3191184, Japan

[4] Kyoto Univ, Inst Res Reactor, Osaka 5900494, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 05期

关键词：

SURFACE-COMPOSITION; POLYSTYRENE; POLYMERS; SEGREGATION; INTERFACE; MIXTURES; TENSION; BLENDS;

D O I：

10.1021/jz100041h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thin films of a typical glassy polymer in alcohol nonsolvents were structurally characterized by specular neutron reflectivity (NR) and were found to be discernibly swollen. The extent of penetration by the nonsolvent was determined by the chain length of the alcohol. Treating this situation as one of a macroscopic phase separation, the interaction chi parameters for the polymer and nonsolvents combinations were extracted. This observation leads us to investigate the factors that control the nonsolvent/polymer interface, being an unusual example of a liquid/liquid interface. The fractional amount of nonsolvents at the substrate interface was higher than that in the internal region of the film. This segregation of a component in a phase-separated domain was explained in terms of an entropic factor.

引用

页码：881 / 885

页数：5

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