The influence of molecular weight on nanoporous polymer films
The influence of molecular weight on nanoporous polymer films
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DOI：
10.1016/s0032-3861(01)00376-7
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发表时间：
2001-10-01
期刊：
影响因子：
4.6
通讯作者：
Russell, TP
中科院分区：
文献类型：
--
作者：
Xu, T;Kim, HC;Russell, TP
聚苯乙烯（PS）和聚甲基丙烯酸甲酯（PMMA）的不对称二嵌段共聚物，PS（S-b-MMA），具有PMMA的圆柱形微区，是生成纳米多孔薄膜的模型系统。通过控制界面相互作用或施加外部电场，圆柱形微区可以垂直于表面取向。暴露于深紫外线辐射降解的PMMA和交联的PS矩阵。在用选择性溶剂冲洗之后，获得纳米多孔膜。通过改变分子量，获得了具有直径为14 ~ 50 nm的六边形孔阵列的光滑多孔膜。结果表明，分子量是一种方便、简单的控制孔径的手段。(C)2001爱思唯尔科技有限公司版权所有。
Asymmetric diblock copolymers of polystyrene (PS) and poly(methylmethacrylate) (PMMA), PS(S-b-MMA), having cylindrical microdomains of PMMA, are model systems to generate nanoporous thin films. With controlled interfacial interactions or applied external electric fields, the cylindrical microdomains can be oriented normal to the surface. Exposure to deep UV radiation degrades the PMMA and crosslinks the PS matrix. After rinsing with a selective solvent, a nanoporous film is obtained. By changing the molecular weight, smooth porous films with hexagonal arrays of pores having diameters ranging from 14 to 50 nm were obtained. The results show that molecular weight is a convenient, simple means of controlling pore diameter. (C) 2001 Elsevier Science Ltd. All rights reserved.