EFFECT OF SiO2 PARTICLES ON PHASE-SEPARATION OF POLY(METHYL METHACRYLATE)/POLY(STYRENE-co-ACRYLONITRILE) BLENDS

WU Qiang; DU Miao; PENG Mao; ZUO Min; ZHENG Qiang

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EFFECT OF SiO2 PARTICLES ON PHASE-SEPARATION OF POLY(METHYL METHACRYLATE)/POLY(STYRENE-co-ACRYLONITRILE) BLENDS

Research Article | 更新时间：2021-03-19

- EFFECT OF SiO2 PARTICLES ON PHASE-SEPARATION OF POLY(METHYL METHACRYLATE)/POLY(STYRENE-co-ACRYLONITRILE) BLENDS
- Acta Polymerica Sinica Issue 3, Pages: 223-229(2007)
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- Published：10 March 2007，
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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 (3):223-229(2007)
DOI：

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 (3):223-229(2007) DOI：

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.

Abstract

The effect of fumed silica (SiO2) 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 SiO2 particles was obtained.The results revealed that the influence of SiO2 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 SiO2 particles could increase the phase-separation temperature (Ts) 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 SiO2 particles decreases Ts.This phenomenon was attributed to the component difference between the surface of SiO2 particles and the matrix of PMMA/SAN blends.

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

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