Probing Glass Transitions in Thin and Ultrathin Polystyrene Films by Stick-Slip Behavior during Dynamic Wetting of Liquid Droplets on Their Surfaces

被引：36

作者：

Zuo, Biao ^{[1
]}

Qian, Chao ^{[1
]}

Yan, Donghuan ^{[1
]}

Liu, Yingjun ^{[1
]}

Liu, Wanglong ^{[1
]}

Fan, Hao ^{[1
]}

Tian, Houkuan ^{[1
]}

Wang, Xinping ^{[1
]}

机构：

[1] Zhejiang Sci Tech Univ, Dept Chem, Key Lab Adv Text Mat & Mfg Technol, Educ Minist, Hangzhou 310018, Zhejiang, Peoples R China

来源：

MACROMOLECULES | 2013年 / 46卷 / 05期

基金：

中国国家自然科学基金;

关键词：

CONTACT-ANGLE MEASUREMENTS; POLYMER-FILMS; SUPERCOOLED LIQUIDS; MOLECULAR-MOTION; SPIN-CAST; TEMPERATURE; CONFINEMENT; RELAXATION; INTERFACE; VISCOELASTICITY;

D O I：

10.1021/ma3023734

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A novel method was developed to detect the glass transition of thin and ultrathin polystyrene (PS) films by correlating the relationships between the temperature-dependent viscoelasticity of the PS films and stick-slip behavior on their surfaces during dynamic wetting of glycerol or oligo-poly(ethylene glycol) droplets. The peak temperature (T-jm) obtained from the jumping angle-film temperature curve, in which the jumping angle Delta theta was employed to scale the stick slip behavior, was nearly identical to the corresponding T-g (or T-alpha) of the PS film. This was confirmed by dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). The change of the measured T-jm with film thickness and substrate chemistry (SiO2-Si and H-Si) further confirmed that the developed method is very sensitive for detecting the dynamics of ultrathin polymer films.

引用

页码：1875 / 1882

页数：8

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