Morphology Evolution,Conductive and Viscoelastic Behaviors of Chemically Reduced Graphene Oxide Filled Poly(methyl methacrylate)/Poly(styrene-co-acrylonitrile) Nanocomposites during Annealing  

作　　者：Chao-ying Lin 左敏 Hui-hui Li Ting Liu Qiang Zheng 

机构地区：[1]MOE 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》2015年第8期1162-1175,共14页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51273173 and 51003093);the Research Foundation of Education Bureau of Zhejiang Province(No.Y200908238)

摘　　要：The effect of chemically reduced graphene oxide （CRGO） on the phase separation behavior of poly（methyl methacrylate）/poly（styrene-co-acrylonitrile） （PMMA/SAN） blends and the simultaneous response of rheological and conductive behavior of PMMA/SAN/CRGO nanocomposites upon annealing above the phase-separation temperatures were investigated. The introduction of CRGO causes the decrease of binodal temperature and the increase of spinodal temperature for PMMA/SAN blends and then enlarges their metastable regime. During annealing, the well-dispersed CRGO in the homogeneous blend matrix tends to be selectively located in the SAN-rich phase with the evolution of phase separation and then the CRGO further agglomerates effectively in the SAN-rich phase to form the conductive pathway. Thermal-induced dynamic percolation is observed for both the resistivity p and dynamic storage modulus G＇ as a function of annealing time. The resistivity variation is ascribed to the agglomeration of CRGO in the SAN-rich phase, while the modulus evolution is attributed to the combined contribution of phase separation for blend matrix and the agglomeration of CRGO in the SAN-rich phase.The effect of chemically reduced graphene oxide （CRGO） on the phase separation behavior of poly（methyl methacrylate）/poly（styrene-co-acrylonitrile） （PMMA/SAN） blends and the simultaneous response of rheological and conductive behavior of PMMA/SAN/CRGO nanocomposites upon annealing above the phase-separation temperatures were investigated. The introduction of CRGO causes the decrease of binodal temperature and the increase of spinodal temperature for PMMA/SAN blends and then enlarges their metastable regime. During annealing, the well-dispersed CRGO in the homogeneous blend matrix tends to be selectively located in the SAN-rich phase with the evolution of phase separation and then the CRGO further agglomerates effectively in the SAN-rich phase to form the conductive pathway. Thermal-induced dynamic percolation is observed for both the resistivity p and dynamic storage modulus G＇ as a function of annealing time. The resistivity variation is ascribed to the agglomeration of CRGO in the SAN-rich phase, while the modulus evolution is attributed to the combined contribution of phase separation for blend matrix and the agglomeration of CRGO in the SAN-rich phase.

关 键 词：Phase separation Chemically reduced graphene oxide PMMA/SAN blend Electrical conduction Dynamicmodulus. 

分 类 号：TQ317[化学工程—高聚物工业] O613.71[理学—无机化学]