| 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 |
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| 引用本文： | 杜淼,王利群,杨碧波,宋栩冰,郑强.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[J].高等学校化学学报,2002,23(5):961-964. |
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| 作者姓名： | 杜淼 王利群 杨碧波 宋栩冰 郑强 |
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| 作者单位： | 浙江大学高分子科学与工程学系,杭州,310027 |
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| 基金项目： | 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． |
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| 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）共混体系的动态流为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量模量G′与频率ω的关系lgG ′-lg(ωαT）]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。
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| 关 键 词： | 聚甲基丙烯酸甲酯／聚（苯乙烯－丙烯腈）共混物 动态流变响应 动态流为行为 时温叠加 相分离 流变学 |
| 文章编号： | 0251-0790(2002)05-0961-04 |
Characteristic Dynamic Rheological Response to Phase Separation for Poly(methyl methacrylate)/Poly(styrene-co-acrylonitrile) Blends |
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| DU Miao,WANG Li-Qun,YANG Bi-Bo,SONG Xu-Bing,ZHENG Qiang.Characteristic Dynamic Rheological Response to Phase Separation for Poly(methyl methacrylate)/Poly(styrene-co-acrylonitrile) Blends[J].Chemical Research In Chinese Universities,2002,23(5):961-964. |
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| Authors: | DU Miao WANG Li-Qun YANG Bi-Bo SONG Xu-Bing ZHENG Qiang |
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| Institution: | DU Miao,WANG Li-Qun,YANG Bi-Bo,SONG Xu-Bing,ZHENG Qiang* |
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| Abstract: | 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. |
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| Keywords: | Keywords Poly (methyl methacrylate) /poly (styrene-co-acrylonitrile) blends Dynamic rheological behavior Time-temperature superposition Phase separation |
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