高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (9): 1832-1837.doi: 10.7503/cjcu20150237

• 高分子化学 • 上一篇    下一篇

链拓扑结构对嵌段共聚物结晶行为的影响

张丽丽1,2, 陈巧悦2,3, 周恒为2, 石彤非3, 黄以能1,2()   

  1. 1. 南京大学物理学院, 国家固体微结构重点实验室, 南京 210093
    2. 伊犁师范学院, 新疆凝聚态相变与微结构实验室, 伊宁 835000
    3. 中科院长春应用化学所, 高分子物理与化学国家重点实验室, 长春 130022
  • 收稿日期:2015-03-25 出版日期:2015-09-10 发布日期:2015-07-06
  • 作者简介:联系人简介: 黄以能, 男, 博士, 教授, 主要从事凝聚态相变研究. E-mail:ynhuang@nju.edu.cn
  • 基金资助:
    伊犁师范学院一般项目(批准号: 2013YLSYB16)、 新疆凝聚态物理重点学科专项经费开放课题(批准号: 2012ZDXK31)和国家重点基础研究发展计划子课题(批准号: 2012CB821503)资助

Influences of Topological Chain Structures to the Crystallization of Block Copolymers

ZHANG Lili1,2, CHEN Qiaoyue2,3, ZHOU Hengwei2, SHI Tongfei3, HUANG Yineng1,2,*()   

  1. 1. School of Physics, National Lab of Solid State Microstructures, Nanjing University, Nanjing 210093, China
    2. Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters,College of Physical Science and Technology, Yili Normal University, Yining 835000, China
    3. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry,Chinese Academy of Science, Changchun 130022, China
  • Received:2015-03-25 Online:2015-09-10 Published:2015-07-06
  • Contact: HUANG Yineng E-mail:ynhuang@nju.edu.cn

摘要:

通过等量的聚乙二醇(PEG)和聚苯乙烯(PS)合成了H型(PS)2-PEG-(PS)2(PEG链接在PS链的中间)和线型PS-PEG-PS(PEG链接在PS链的一端)三嵌段共聚物, 并通过X射线小角散射(SAXS)、 X射线广角衍射(WAXD)、 示差扫描量热仪(DSC)和偏光显微镜(POM)等手段研究了其结晶行为, 结果表明2种共聚物中PEG的晶型相同, 但是H型比线形结晶温度更低, PEG片晶厚度更小, 在相同温度下PEG结晶速度更慢, 这是由于H型分岔结构引起空间位阻较大所致.

关键词: 嵌段共聚物, 结晶行为, 动力学, 聚乙二醇, 聚苯乙烯

Abstract:

The crystallization behavior of two kinds of triblock block copolymers synthesized with equal content of polyethylene glycol(PEG) and almost equal content of polystyrene(PS), namely H-type(PS)2-PEG-(PS)2(PEG chains linking in the middle of PS chains) and linear PS-PEG-PS(PEG chains linking to the end of PS chains), were studied comparatively by small-angle X-ray scattering(SAXS), wide angle X-ray diffraction(WAXD), differential scanning calorimetry(DSC), polarized optical microscopy(POM) and other means. It is found that, although the crystal forms of PEGs in copolymers are same, the crystallization tem-perature of the H-type is lower than that of the linear, the thickness of PEG crystal lamella is smaller, and the crystallization rate is slower at the same temperature, which originates from the larger steric hindrance caused by the bifurcation chain structure of H-type copolymer.

Key words: Block copolymer, Crystallization behavior, Dynamics, Polyehylene glycol, Polystyrene

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