INFLUENCE OF CLAY ON THE MORPHOLOGY AND PHASE SEPARATION BEHAVIOR OF POLY(METHYL METHACRYLATE)/POLY(STYRENE-co-ACRYLONITRILE) BLENDS  

作　　者：De-zheng Pang 左敏 Ji-shi Zhao 郑强 

机构地区：[1]Key Laboratory of Macromolecule Synthesis and Functionalization,Ministry of Education,Department of Polymer Science and Engineering,Zhejiang University

出　　处：《Chinese Journal of Polymer Science》2013年第11期1470-1483,共14页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51003093);the Program for Zhejiang Provincial Innovative Research Teams(No.2009R50004);the Research Foundation of Education Bureau of Zhejiang Province(No.Y200908238)

摘　　要：The effect of clay on the morphology and phase-separation behavior of poly（methyl methacrylate）/poly（styrene- co-acrylonitrile） （PMMA/SAN） blends and the variation of clay dispersion have been investigated. With the evolution of phase separation in PMMA/SAN, most of the clays are first located at the boundaries between PMMA and SAN, and then gradually move to the PMMA-rich domain, owing to the affinity of clay to PMMA. The introduction of clay causes the increase of binodal and spinodal temperatures of PMMA/SAN and enlarges their metastable region, indicating the phase stabilizing effect of clay on the matrix. But the influence of clay on the cloud points obviously depends on the composition of PMMA/SAN. The selective adsorption of PMMA on the clay results in the difference between the composition of surface layer and that of polymer matrix. Hence, the clay plays the role of an agent changing the conditions of phase structure formation.The effect of clay on the morphology and phase-separation behavior of poly（methyl methacrylate）/poly（styrene- co-acrylonitrile） （PMMA/SAN） blends and the variation of clay dispersion have been investigated. With the evolution of phase separation in PMMA/SAN, most of the clays are first located at the boundaries between PMMA and SAN, and then gradually move to the PMMA-rich domain, owing to the affinity of clay to PMMA. The introduction of clay causes the increase of binodal and spinodal temperatures of PMMA/SAN and enlarges their metastable region, indicating the phase stabilizing effect of clay on the matrix. But the influence of clay on the cloud points obviously depends on the composition of PMMA/SAN. The selective adsorption of PMMA on the clay results in the difference between the composition of surface layer and that of polymer matrix. Hence, the clay plays the role of an agent changing the conditions of phase structure formation.

关 键 词：Nanocomposites PMMA/SAN blend CLAY Phase separation behavior Morphology. 

分 类 号：O631.3[理学—高分子化学]