高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1339.

• 论文 • 上一篇    下一篇

用动态粘弹函数关系表征PMMA/α-MSAN共混物的相分离

郑强1, 荒木修2, 升田利史郎2   

  1. 1. 浙江大学高分子科学与工程学系, 杭州, 310027;
    2. 京都大学工学部材料化学系, 京都, 606, 日本
  • 收稿日期:1997-11-28 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 郑强,男,37岁,博士,副教授.
  • 作者简介:郑强,男,37岁,博士,副教授.
  • 基金资助:

    国家自然科学基金(批准号:59673020)资助课题.

Characterization of the Phase separation in PMMA/α-MSAN Blends Using the Dynamic Viscoelastic Functions

ZHENG Qiang1, ARAKI Osamu2, MASUDA Toshiro2   

  1. 1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027;
    2. Division of Material Chemistry, Faculty of Engineering, Kyoto University, Kyoto 606, Japan
  • Received:1997-11-28 Online:1998-08-24 Published:1998-08-24

PDF (PC)

摘要： 测定了聚甲基丙烯酸甲酯/聚(α-甲基苯乙烯丙烯腈)共混物熔体的动态粘弹性.考察动态储能模量G′与动态损耗模量G″的关系,发现在终端区域两种聚合物的lgG′～lgG″关系曲线与温度无关,其外推直线斜率接近2;而其共混物的斜率明显小于2,并随组成变化呈现温度依赖性,由此得到的"临界温度"可用于表征这种具有LCST行为的共混物的相容性.

关键词: 聚甲基丙烯酸甲酯, 聚(&alpha, －甲基苯乙烯丙烯腈), 共混物熔体, 动态粘弹函数, 相分离

Abstract: The dynamic viscoelasticity of poly(methyl methacrylate)/poly(α-methylstyrene-co-acrylonitrile)(PMMA/α-MSAN) blends in the molten state was measured. By examining the correlation between dynamic storage modulus(G ′) and dynamic lose modulus (G ″), it was found that for the two components, the plots of lgG ′vs. lgG ″show no discernible or a little temperature dependence, and the slopes of the plots in the terminal region approach 2. But for PMMA/ α-MSAN blends, the slopes are less than2, exhibiting temperature dependence relevant to compositions of the blends. By comparing the lgG ′ vs. lgG ″ correlation between the two components and the blends, we obtained so called "critical temperatures(Tb)", which are useful for characterizing the phase separation of PMMA/ α-MSAN blends.

Key words: Poly(methyl methacrylate), Poly(α-methylstyrene co acrylonitrile), Blend melt, Dynamic viscoelastic functions, Phase-separation

中图分类号: 

TrendMD: