高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (5): 961.

• 研究论文 • 上一篇    下一篇

聚甲基丙烯酸甲酯/聚(苯乙烯-丙烯腈)共混体系相分离的特征动态流变响应

杜淼, 王利群, 杨碧波, 宋栩冰, 郑强   

  1. 浙江大学高分子科学与工程学系, 杭州 310027
  • 收稿日期:2001-03-28 出版日期:2002-05-24 发布日期:2002-05-24
  • 通讯作者: 郑强(1960年出生),男,教授,博士生导师,主要从事多相/多组分高分子体系流变学研究.E-mail:zhengqiang@cmsce.zju.edu.cn E-mail:zhengqiang@cmsce.zju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:59973018);教育部优秀青年教师基金(批准号:[2000]11)资助.

Characteristic Dynamic Rheological Response to Phase Separation for Poly(methyl methacrylate)/Poly(styrene-co-acrylonitrile) Blends

DU Miao, WANG Li-Qun, YANG Bi-Bo, SONG Xu-Bing, ZHENG Qiang   

  1. Department of Polymer Science and Engineering, ZheJiang University, Hangzhou 310027, China
  • Received:2001-03-28 Online:2002-05-24 Published:2002-05-24

PDF (PC)

被引次数

59

摘要： 采用动态流变学方法,结合小角激光光散射(SALLS)测定,对聚甲基丙烯酸甲酯(PMMA)/聚(苯乙烯－丙烯腈)(SAN)共混体系的动态流变行为与相分离的关系进行了研究.发现在低频区域,时温叠加失效与共混物体系发生相分离有关,时温叠加失效温度Tb与用SALLS测定的浊点温度Tc一致,用低频区域动态储能模量G'与频率的关系[1gG'～lg(αT)]偏离线性粘弹模型或时温叠加失效温度表征PMMA/SAN共混体系的相分离是有效的.

关键词: 聚甲基丙烯酸甲酯/聚(苯乙烯－丙烯腈)共混物, 动态流变行为, 时温叠加, 相分离

Abstract: On the basis of phase separation temperatures (Tc) for poly (methyl methacrylate )/poly-(styrene-co-acrylonitrile) (PMMA/SAN) blends with different compositions, measured by small angle laser light scattering (SALLS), we have studied the dynamic rheological behavior of these blends at various temperatures below, near and above Tc.The results showed that the time-temperature superposition principle could be applied and the linear viscoelastic response emerged in the terminal region at temperatures below Tc.However, it was found that the breakdown of time-temperature superposition principle appeared, and viscoelastic response was deviated from the linear behavior in the terminal region at temperatures near and above Tc.

Key words: Poly (methyl methacrylate) /poly (styrene-co-acrylonitrile) blends, Dynamic rheological behavior, Time-temperature superposition, Phase separation

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