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Kinetic study of a swelling-induced network of folds in a cross-linked PS-PDMS film

机译：交联PS-PDMS膜中肿胀诱导网络的动力学研究

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摘要

Solvent-induced mechanical instability in a cross-linked poly(styrene-block-dimethylsiloxane) (PS-PDMS) film attached to a rigid substrate was systematically investigated. Through swelling with appropriate solvent vapor, a unique network of folds could be constructed successfully without the wrinkle-to-fold transition. Instead, small holes resulting from the mesostructural organization of PS-PDMS formed as nuclei to induce formation and growth of invaginated folds resembling creases which then constructed a network of invaginated folds. A complete network of sharp folds could be obtained after the two edges of a valley were combined into a sharp fold. The morphology and kinetics were closely related to the solvent solubility parameter and saturated vapor pressure. We varied the ratio between a relatively good solvent vapor and a poor solvent vapor, and so produced a slower dynamic process to precisely control the surface morphology. Poorly ordered cylinders with varied sizes resulting from strong cross-linking and spatial restrictions imposed by the network of folds could be obtained.
机译：系统地研究了连接到刚性基板的交联聚（苯乙烯 - 嵌段二甲基硅氧烷）（PS-PDMS）膜中的溶剂诱导的机械不稳定性。通过用适当的溶剂蒸汽膨胀，可以成功地构建独特的折叠网络而没有皱折的过渡。相反，由PS-PDMS的Mesostratural A组织形成的小孔形成为核，以诱导类似于折痕的造成折叠的形成和生长，然后折叠被构造了一个有型褶皱的网络。在将谷的两个边缘组合成锋利的折叠之后，可以获得一个完整的锋利褶皱网络。形态和动力学与溶剂溶解度参数和饱和蒸气压密切相关。我们改变了相对良好的溶剂蒸气与溶剂蒸汽的比例，因此产生了较慢的动态过程，精确控制表面形态。可以获得由具有强大交联和由折叠网络施加的空间限制产生的多种尺寸的圆柱体不良圆柱体。

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  • 来源
    《RSC Advances》 |2015年第5期|共10页
  • 作者

    Xu Xin; Yao Xuelin; Chen Feng; Fu Qiang;

  • 作者单位

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Polymer Sci &

    Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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