| SiO_2粒子对PMMA/SAN共混体系相分离行为的影响 |
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| 引用本文： | 吴强,杜淼,彭懋,左敏,郑强.SiO_2粒子对PMMA/SAN共混体系相分离行为的影响[J].高分子学报,2007,0(3):223-229. |
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| 作者姓名： | 吴强 杜淼 彭懋 左敏 郑强 |
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| 作者单位： | 高分子合成与功能构造教育部重点实验室,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
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高等学校博士学科点专项科研项目 |
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| 摘 要： | 采用小角激光光散射(SALLS)并结合动态流变学方法,考察了气相法二氧化硅(SiO2)粒子的加入对聚甲基丙烯酸甲酯/苯乙烯-丙烯腈无规共聚物(PMMA/SAN)共混体系相行为的影响,得到了添加SiO2粒子前后的相图,发现SiO2粒子对基体相行为的影响与基体的组成有关.对PMMA/SAN(60/40)体系,加入SiO2粒子后相分离温度上升,但并未改变相分离机理,仍为亚稳单相分解过程(spinodal decomposition,SD);而对于PMMA/SAN(30/70)体系,加入SiO2粒子后却降低了体系的相分离温度.该现象可能是SiO2粒子和基体组分界面间组成与PMMA/SAN共混物基体组成的差异造成的.
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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 气相法SiO2粒子 相分离 小角激光光散射 动态流变行为 |
| 收稿时间： | 2006-01-16 |
| 修稿时间： | 2006-03-17 |
EFFECT OF SiO2 PARTICLES ON PHASE-SEPARATION OF POLY(METHYL METHACRYLATE)/POLY(STYRENE-co-ACRYLONITRILE) BLENDS |
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| WU Qiang,DU Miao,PENG Mao,ZUO Min,ZHENG Qiang.EFFECT OF SiO2 PARTICLES ON PHASE-SEPARATION OF POLY(METHYL METHACRYLATE)/POLY(STYRENE-co-ACRYLONITRILE) BLENDS[J].Acta Polymerica Sinica,2007,0(3):223-229. |
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| Authors: | WU Qiang DU Miao PENG Mao ZUO Min ZHENG Qiang |
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| Institution: | Key Laboratory of Macromolecule Synthesis and Functionalization,Ministry of Education;Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027 |
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| Abstract: | The effect of fumed silica(SiO_2) particles on the phase behavior of poly (methyl methacrylate)(PMMA)/poly(styrene-co-acrylonitrile)(SAN) blends was studied by using small angle laser light scattering(SALLS) and dynamic rheology.The phase diagram of PMMA/SAN blends unfilled and filled with SiO_2 particles was obtained.The results revealed that the influence of SiO_2 particles on the phase separation behavior of the blend matrix was related to the components of PMMA/SAN blends.Comparing with the 60/40(W/W) PMMA/SAN blends,the addition of a small amount of SiO_2 particles could increase the phase-separation temperature(T_s) and could hardly result in the changes of phase separation mechanism,namely,both filled and unfilled blends obeyed the spinodal decomposition mechanism.However,for 30/70 PMMA/SAN blends,the addition of SiO_2 particles decreases T_s.This phenomenon was attributed to the component difference between the surface of SiO_2 particles and the matrix of PMMA/SAN blends. |
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| Keywords: | Poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) blends Fumed SiO_2 pariticle Phase separation Small angle laser lighting scatter Dynamic rheological behavior |
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