Citation: Ji-shi Zhao, Min Zuo, Chao-ying Lin, Qiang Zheng. Effect of Nanoclay on the Phase Separation Behavior of Poly(methyl methacrylate)/Poly(vinyl acetate) Binary Polymer Blends[J]. Chinese Journal of Polymer Science, ;2014, 32(11): 1419-1430. doi: 10.1007/s10118-014-1527-5 shu

Effect of Nanoclay on the Phase Separation Behavior of Poly(methyl methacrylate)/Poly(vinyl acetate) Binary Polymer Blends

1.
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: 18 December 2013
Revised Date: 16 January 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 51003093 and 51273173), the Program for Zhejiang Provincial Innovative Research Teams (No. 2009R50004) and the Research Foundation of Education Bureau of Zhejiang Province (No. Y200908238).

The effect of nanoclay on the phase-separation behavior of poly(methyl methacrylate)/poly(vinyl acetate) (PMMA/PVAc) blends has been mainly investigated by small-angle laser light scattering. It is found that the effect of clay on the thermodynamics and kinetics of phase-separation for PMMA/PVAc blends seems inconsistent. The kinetics phase-separation rate decreases, while the thermodynamics parameters, cloud points Tcand delay time tD of isothermal phase-separation also decrease, and the variation amplitude depends on the matrix composition. The affinity of clay to PMMA results in the composition difference between the border layer and the polymer matrix and further causes the concentration fluctuation at the early stage of phase separation to reduce Tc and tD. On the other hand, the decrease of phase-separation rate is caused by the mechanical barrier effect of clay on the macromolecular diffusion of blend matrix. Hence, such seemingly counterintuitive results on the thermodynamics and kinetics of phase-separation are attributed to different dominant factors.
- Nanocomposites,
- PMMA/PVAc blend,
- Clay,
- Phase separation behavior,
- Morphology
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沈阳化工大学材料科学与工程学院沈阳 110142