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SiO2粒子对PMMA/SAN共混体系相分离行为的影响
引用本文:吴强,杜淼,彭懋,左敏,郑强. SiO2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
作者姓名:吴强  杜淼  彭懋  左敏  郑强
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;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;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;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;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
基金项目:国家自然科学基金 , 高等学校博士学科点专项科研项目
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.

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
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
Authors:WU Qiang  DU Miao  PENG Mao  ZUO Min  ZHENG Qiang
Affiliation:Key Laboratory of Macromolecule Synthesis and Functionalization,Ministry of Education;Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027
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.
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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