线性刚柔三嵌段聚合物的复杂液晶结构
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- 英文论文题名：Complex liquid-crystal nanostructures in semiflexible ABC linear triblock copolymers
- 论文作者：李士本 ; 蒋滢 ; 陈征宇
- 英文论文作者：Shiben Li ; Ying Jiang ; Jeff Z.Y.Chen ; Department of Physics ; Wenzhou University ; School of Chemistry and Environment & Center of Soft Matter Physics and Its Applications ; Beihang University ; Department of Physics and Astronomy ; University of Waterloo
- 年：2016
- 作者机构：温州大学物理系浙江省温州市茶山高教园区温州大学南校区物电学院;北京航空航天大学化学与环境学院软物质物理及其应用中心;加拿大滑铁卢大学物理及天文学系;
- 论文关键词：刚柔三嵌段 ; 复杂液晶结构 ; 自洽场理论 ; 蠕虫状链
- 会议召开时间：2016-08-25
- 会议录名称：中国化学会2016年软物质理论计算与模拟会议论文摘要集
- 语种：中文
- 分类号：O631.1
- 学会代码：ZGHY
- 会议名称：中国化学会2016年软物质理论计算与模拟会议
- 会议地点：中国天津
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：2
- 文件大小：158k
- 原文格式：D
- 会议级别：全国
摘要
本文研究了两类ABC线性三嵌段聚合物的微观结构随中间嵌段的刚柔性转变的规律。我们对所获得液晶结构的空间有序性、液晶取向等进行了详细的分析,并与已有实验结果进行了比较。本文所采用的理论框架是基于蠕虫状链模型的自洽平均场理论,并同时考虑了Flory-Huggins各向同性相互作用和Maier-Saupe各向异性相互作用。结果表明,聚合物刚柔性参数的改变等价于其柔性链的聚合度和刚性链的持久长度的改变,提供了一种设计和调控半刚性聚合物复杂相分离结构的途径。
It is shown that two series of ABC linear triblock copolymers possess sequences of order-to-order phase transitions between microphase-separated states,as the degree of flexibility of the semiflexible middle B-blocks varies.The spatial and orientational symmetries of these phases,some of them containing liquid-crystal ordering,are analysed in comparison with related structures previously determined experimentally and theoretically.A theoretical framework based on the self-consistent field treatment of the wormlike-chain model,that incorporates the Flory-Huggins and Maier-Saupe interactions in the free energy,is used here as a basic foundation for numerical calculations.It is suggested that tuning the flexibility parameter,which reduces to the concept of degree of polymerization in the coil-like limit and characterizes the chain-persistency in the rod-like limit,provides a promising approach that can be used to design the resulting microphase-separated structures in semiflexible copolymer melts.
It is shown that two series of ABC linear triblock copolymers possess sequences of order-to-order phase transitions between microphase-separated states,as the degree of flexibility of the semiflexible middle B-blocks varies.The spatial and orientational symmetries of these phases,some of them containing liquid-crystal ordering,are analysed in comparison with related structures previously determined experimentally and theoretically.A theoretical framework based on the self-consistent field treatment of the wormlike-chain model,that incorporates the Flory-Huggins and Maier-Saupe interactions in the free energy,is used here as a basic foundation for numerical calculations.It is suggested that tuning the flexibility parameter,which reduces to the concept of degree of polymerization in the coil-like limit and characterizes the chain-persistency in the rod-like limit,provides a promising approach that can be used to design the resulting microphase-separated structures in semiflexible copolymer melts.
引文
[1]Li,S.;Jiang,Y.;Chen;J.Z.Y.,unpublished manuscript 2016.