Direct Observation of Conformational Relaxation of Polymer Chains at Surfaces

被引：27

作者：

Nguyen, Hung K. ^{[1
]}

Inutsuka, Manabu ^{[1
]}

Kawaguchi, Daisuke ^{[2
]}

Tanaka, Keiji ^{[1
,3
]}

机构：

[1] Kyushu Univ, Dept Appl Chem, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8190395, Japan

[2] Kyushu Univ, Educ Ctr Global Leaders Mol Syst Devices, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8190395, Japan

[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8190395, Japan

来源：

ACS MACRO LETTERS | 2018年 / 7卷 / 10期

关键词：

SUM-FREQUENCY GENERATION; MONODISPERSE POLYSTYRENE FILMS; VIBRATIONAL SPECTROSCOPY; GLASS-TRANSITION; SPIN-CAST; THIN; INTERFACE; DYNAMICS;

D O I：

10.1021/acsmacrolett.8b00411

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Sum-frequency generation spectroscopy was employed to follow the conformation evolution of polystyrene chains at the surface of a spin-coated film in a temperature-ramping mode as well as under isothermal annealing. The conformation of surface chains in an as-cast film was observed to be in a nonequilibrium state, in accordance with reported results for polymer chains in thin spin-coated films. While the relaxation of surface nonequilibrium chains was induced by the enhanced surface mobility, the whole chain motion such as reptation might be a key factor in determining the time scale for equilibrating the surface chain conformation.

引用

页码：1198 / 1202

页数：9

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