Citation: Chao-ying Lin, Min Zuo, Hui-hui Li, Ting Liu, Qiang Zheng. Morphology Evolution, Conductive and Viscoelastic Behaviors of Chemically Reduced Graphene Oxide Filled Poly(methyl methacrylate)/Poly(styrene-co-acrylonitrile) Nanocomposites during Annealing[J]. Chinese Journal of Polymer Science, ;2015, 33(8): 1162-1175. doi: 10.1007/s10118-015-1666-3 shu

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

Chao-ying Lin ¹ ,
Min Zuo ^1,, ,
Hui-hui Li ¹ ,
Ting Liu ¹ ,
Qiang Zheng ¹

1.
MOE Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding author: Min Zuo,
Received Date: 30 December 2014
Revised Date: 20 January 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 51273173 and 51003093) and the Research Foundation of Education Bureau of Zhejiang Province (No. Y200908238).

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 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.
- Phase separation,
- Chemically reduced graphene oxide,
- PMMA/SAN blend,
- Electrical conduction,
- Dynamic modulus
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