中文摘要：

运用小角激光光散射（SALS）和透射电镜（TEM）等测试方法,考察了空心玻璃微珠（HGB）的含量及粒子尺寸对PMMA/SAN共混体系相分离的影响。结果表明,微米级粒子HGB粒子的填充不影响聚合物基体的相分离机理,填充和未填充体系的相行为均遵循spinodal（SD）相分离机理,但HGB粒子对组成不同的PMMA/SAN共混物基体会产生不同程度的诱导作用。HGB粒子的加入会使60/40PMMA/SAN基体相分离初期的扩散系数降低,减缓了相分离进程。微米级HGB粒子的加入对共混物基体的相形态与结构影响不显著。

英文摘要：

Phase-separation behavior for hollow glass beads （HGB） filled and unfilled polymethyl methyacrylate/styrene-co-acrylonitrile （PMMA/SAN） blends were investigated by small angle lighting scatter （SALS） as well as transmission electron microscope （TEM）. The results reveals that the addition of micro- scale HGB particles slightly changes the phase-separation dynamics the 60/40 PMMA/SAN blends, but not for that of 80/20 mixture. The apparent diffusion coefficient of early phase-separation stage for HGB particles the filled system is relatively smaller than that of unfilled, indicating that the addition of HGB particles slows down the phase-separation process. It is suggested that a kind of ＂induced effect＂ caused by the interaction between particles and polymer matrix relates to the glass beads content and size. The higher the particles content, the smaller particle size, the larger interfacial areas are, leading to the stronger interaction between the particles and polymer matrix. The phase morphology for filled and unfilled blends was observed through TEM, and it is found that the separated-phase domain grown is almost the same as the unfilled blends.