不同共混方式下非对称嵌段共聚物PS-b-PMMA对PCHMA/PMMA<br/>体系增容效果的研究:界面与胶束的竞争<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.08.020

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Abstract Using melt blending, the asymmetric diblock copolymer polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) was added to compatibilize poly(cyclohexyl methacrylate) (PCHMA) and poly(methyl methacrylate) (PMMA) blends. Effects of the block ratio, blending method, and molecular weight of the dispersed phase PMMA was discussed to study the distribution of asymmetric block copolymer, namely the competition of interface and micelles. The results show that the blend method has significant influence on the distribution of the asymmetric block copolymer in the case of a low molecular weight PMMA. The change of the blending method can effectively reduce the number of the micelles in the dispersed phase, and the asymmetric block copolymer is mainly distributed on the interface of the compatibilized blends. On the other hand, the increase of the PMMA molecular weight can change the interfacial curvature of the asymmetric block copolymer between two phases, resulting in an increase of the solubility in the dispersed phase and the unstablility of block copolymer on the interface, which leads to the migration of BCPs into the dispersed phase and finally the micelles were formed.

Key words： asymmetric block copolymer blending methods compatibilization interface micelles

Published: 02 May 2018

CLC number:	TQ320.1
	TQ320.2
	TQ320.7

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	Articles by authors
	WANG Keqiang
	YE Shenjie
	WANG Wenjin
	FU Jia
	CHEN Zhongren

Cite this article:

WANG Keqiang,YE Shenjie,WANG Wenjin, et al. Effect of Asymmetric Block Copolymer PS-b-PMMA on the Compatibility of PCHMA/PMMA Blends by Different Blending Methods: Interface vs Micelles[J]. Materials Reports, 2017, 31(8): 98-103.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.08.020 OR http://www.mater-rep.com/EN/Y2017/V31/I8/98

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