高分子量聚合物对溶剂诱导低分子量聚合物薄膜去润湿动力学的影响

doi:10.7503/cjcu20140278

高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (7): 1565.doi: 10.7503/cjcu20140278

高分子量聚合物对溶剂诱导低分子量聚合物薄膜去润湿动力学的影响

刘惠^1,², 郑以松¹, 石彤非²()

1. 吉林大学物理学院, 长春 130012
2. 中国科学院长春应用化学研究所, 高分子物理与化学国家重点实验室, 长春 130022

收稿日期:2014-03-28 出版日期:2014-07-10 发布日期:2014-05-26
作者简介:联系人简介: 石彤非, 男, 博士, 研究员, 主要从事高分子物理研究. E-mail: tfshi@ciac.ac.cn
基金资助:
国家自然科学基金重点项目(批准号: 21234007)资助

Influence of the Polymer with High Molecular Weight on the Solvent-induced Dewetting Dynamics of the Polymer Thin Film with Low Molecular Weight^†

LIU Hui^1,², ZHENG Yisong^1,^*, SHI Tongfei^2,^*()

1. College of Physics, Jilin University,Changchun 130012, China
2. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Received:2014-03-28 Online:2014-07-10 Published:2014-05-26
Contact: ZHENG Yisong,SHI Tongfei E-mail:tfshi@ciac.ac.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21234007)

摘要/Abstract

摘要：

采用偏光显微镜及椭偏仪等研究了单分散低分子量聚苯乙烯(PS)薄膜、单分散高分子量PS薄膜以及将二者按不同质量比共混制备的PS薄膜, 在室温下用丙酮溶剂诱导其去润湿的过程. 实验发现, 按不同质量比共混的PS薄膜的去润湿动力学与单分散的PS薄膜去润湿动力学有较大区别. 按不同质量比共混的PS薄膜, 低分子量的PS更易于富集在薄膜的表面, 其去润湿的速度介于单分散低分子量PS薄膜与单分散高分子量PS薄膜的去润湿速度之间. 但共混薄膜的去润湿速率并非随着高分子量PS的加入呈现单调的变化, 这是由大量接触分子的形成抑制了去润湿所致.

关键词: 聚合物薄膜, 高分子量聚苯乙烯, 低分子量聚苯乙烯, 共混, 去润湿动力学

Abstract:

The dewetting dynamics of the polystyrene(PS) thin film induced by the solvent of acetone with the method of optical microscopy(OM) and Ellipsometer were investigated. We compared the dewetting dynamics of the monodiperse PS with low molecular weight(PSL), that with high molecular weight(PSH) and the mixture of the PSL and PSH(PSM). It was observed that their dewetting behavior was different although the radius of the holes vs. time exhibited exponential behavior for all samples. As for monodiperse PS, there is the difference in rim morphologies because of the viscosity difference between the PSL and the PSH. As for the PSM, the anomaly of the deweting velocity with the addition of PSH happens due to effect of the chain connectors which were partially in the entangle polymer film and partially in the top film.

Key words: Polymer thin film, High molecular weight polystyrene, Low molecular weight polystyrene, Mixture, Dynamics of dewetting

中图分类号:

O631

TrendMD:

刘惠, 郑以松, 石彤非. 高分子量聚合物对溶剂诱导低分子量聚合物薄膜去润湿动力学的影响. 高等学校化学学报, 2014, 35(7): 1565.

LIU Hui, ZHENG Yisong, SHI Tongfei. Influence of the Polymer with High Molecular Weight on the Solvent-induced Dewetting Dynamics of the Polymer Thin Film with Low Molecular Weight^†. Chem. J. Chinese Universities, 2014, 35(7): 1565.

图/表 6

Fig.1 Experimental device of dewetting process

Fig.2 Optical microscopy images of the PS films with different molecular weight[Mw=2.46×103(A) and Mw=1.39×105(B)] and film thickness of (30±5) nm on the Si wafer with the native oxide layer induced by acetone vapor at room temperature

Fig.3 Dependence of hole radius on time for the PS films with different molecular weight[Mw=2.46×105, h=(30±5) nm(A), Mw=1.39×105, h=(30±5) nm(B)] induced by acetone vapor at room temperature

Fig.4 Optical microscopy images of the mixture PS films with different molecular weight on the Si wafer with the native oxide layer induced by acetone vapor at room temperature (A) Mix(17-1); (B) Mix(2-1); (C) Mix(1-1).

Fig.5 Dependence of hole radius on time for the films with the mixture of the monodisperse PS with different molecular weights induced by acetone vapor at room temperature and whole plot for high molecular weight 1.39×105 before the hole coalescence(inset)

Fig.6 Sketch of the mixture of the PS film

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高分子量聚合物对溶剂诱导低分子量聚合物薄膜去润湿动力学的影响

Influence of the Polymer with High Molecular Weight on the Solvent-induced Dewetting Dynamics of the Polymer Thin Film with Low Molecular Weight^†

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高分子量聚合物对溶剂诱导低分子量聚合物薄膜去润湿动力学的影响

Influence of the Polymer with High Molecular Weight on the Solvent-induced Dewetting Dynamics of the Polymer Thin Film with Low Molecular Weight†

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Influence of the Polymer with High Molecular Weight on the Solvent-induced Dewetting Dynamics of the Polymer Thin Film with Low Molecular Weight^†