界面粗糙度对聚苯乙烯/聚（甲基丙烯酸甲酯）双层膜去湿行为的影响。

Effect of interfacial roughness on dewetting behavior of polystyrene/poly(methyl methacrylate) bilayer film.

作者信息

Xue Longjian, Hu Benhui, Han Yanchun

机构信息

State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China.

出版信息

J Chem Phys. 2008 Dec 7;129(21):214902. doi: 10.1063/1.3009250.

DOI:10.1063/1.3009250

PMID:19063579

Abstract

The dewetting behavior of polystyrene (PS) film on poly(methyl methacrylate) (PMMA) sublayer was investigated by changing the short-range roughness of the PMMA sublayer systemically. When the bilayer film was heated to the temperature above both Tgs, the protuberances formed in both layers to reduce the system energy. By tracing the dewetting process of the PS up-layer, the dewetting velocity was found to increase with the roughness of the sublayer. It was demonstrated theoretically and experimentally that the equilibrium contact angle, the apparent equilibrium contact angle, and dewetting velocity of PS film on PMMA sublayer were determined by the roughness of PMMA sublayer.

摘要

通过系统改变聚甲基丙烯酸甲酯（PMMA）子层的短程粗糙度，研究了聚苯乙烯（PS）薄膜在PMMA子层上的去湿行为。当双层薄膜加热到高于两者玻璃化转变温度（Tg）时，两层中都会形成凸起以降低系统能量。通过追踪PS上层的去湿过程，发现去湿速度随子层粗糙度的增加而增大。理论和实验均表明，PS薄膜在PMMA子层上的平衡接触角、表观平衡接触角和去湿速度由PMMA子层的粗糙度决定。