高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (12): 1960.

• 论文 • 上一篇    下一篇

稀链聚苯乙烯微球的特性

赵军, 明伟华, 吕绪良, 汪长春, 府寿宽   

  1. 复旦大学高分子科学系, 上海, 200433
  • 收稿日期:1994-12-07 修回日期:1995-08-07 出版日期:1995-12-24 发布日期:1995-12-24
  • 通讯作者: 府寿宽
  • 作者简介:赵军,女,25岁,硕士研究生.
  • 基金资助:

    国家自然科学基金

Novel Characteristics of Pauci-Chain Polystyrene Microsphere

ZHAO Jun, MING Wei-Hua, LU Xu-Liang, WANG Chang-Chun, FU Shou-Kuang   

  1. Department of Macromolecular Science, Fudan University, Shanghai, 200433
  • Received:1994-12-07 Revised:1995-08-07 Online:1995-12-24 Published:1995-12-24

PDF (PC)

被引次数

7

摘要： 比较了超微乳液聚合得到的稀链聚苯乙烯微球(micro-PS)和常规聚苯乙烯(o-PS)在DSC扫描过程中的不同热行为。micro-PS在第一次扫描过程中在107℃与157℃处出现放热峰,在第二次扫描过程中放热峰消失,和o-PS相类似,仅出现1个玻璃化转变峰。用偏光显微镜和X射线衍射的方法证明该峰是结晶峰,形成晶体的动力来自于micro-PS的特殊构象。

关键词: 超微乳液聚合, 稀链聚苯乙烯微球, 结晶峰

Abstract: Pauci-chain microspheres prepared by microemulsion polymerization contain only one or at most a few macromolecular chains whose special conformation is much different with that of ordinary polymer, which leads to some interesting physical properties. This paper reports apparent differences in thermal behavior between micro-PS (pauci-chainpolystyrene) and o-PS (ordinary polystyrene) during the DSC scan. Micro-PS displayed two exothermic peaks near 107℃ and 157℃ during the first scan. In the subsequent scan, both of them disappeared and only one glass transition similar to o-PS was shown.With the results from experiments of polarizing microscopy and X-ray diffraction, it can be concluded that both of the exothermic peaks were crystalline peaks.

Key words: Microemulsion polymerization, Pauci-chain polystyrene microsphere, Crystalline peak

TrendMD: