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

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

《材料导报》期刊社

2017, Vol. 31

Issue (8): 98-103 https://doi.org/10.11896/j.issn.1005-023X.2017.08.020

材料研究

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

王克强¹, 叶深杰¹, 王文锦¹, 付甲², 陈忠仁²

1 宁波大学材料科学与化学工程学院, 宁波 315211;
2 南方科技大学化学系, 深圳 518055

Effect of Asymmetric Block Copolymer PS-b-PMMA on the Compatibility of PCHMA/PMMA Blends by Different Blending Methods: Interface vs Micelles

WANG Keqiang¹, YE Shenjie¹, WANG Wenjin¹, FU Jia², CHEN Zhongren²

1 Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211;
2 Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055

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摘要采用熔融共混方式,利用非对称两嵌段共聚物聚苯乙烯-b-聚甲基丙烯酸甲酯(PS-b-PMMA)对聚甲基丙烯酸环己酯(PCHMA)/聚甲基丙烯酸甲酯(PMMA)共混体系进行增容。重点研究了嵌段比、共混方式以及分散相PMMA分子量对共混体系中非对称嵌段共聚物分布的影响,即嵌段共聚物稳定相界面与所形成胶束数量、位置之间的竞争关系。结果表明,在低分子量PMMA情况下共混方式对非对称嵌段共聚物的分布影响显著,改变共混方式可以有效减少分散相中的胶束数量,使嵌段共聚物主要分布在二元不相容增容体系两相界面。另一方面,增大PMMA分子量会改变非对称嵌段共聚物在两相界面的界面曲率,导致其在分散相中的溶解性增大,在界面上的稳定性减小,从而迁移至分散相内部并最终形成胶束。

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关键词: 非对称嵌段共聚物共混方式增容界面胶束

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

出版日期: 2017-04-25 发布日期: 2018-05-02

ZTFLH:	TQ320.1
	TQ320.2
	TQ320.7

基金资助: 化学工程联合国家重点实验室开放课题(SKL-ChE-12D01);国家自然科学基金(NSFC21274070);宁波市“3315”计划(A类)(2012S0001);浙江省重点科技创新团队计划(2011R5001);宁波市科技局/农业与社会发展攻关项目(2011A31002);南方科技大学科研启动经费(Y01216121)

通讯作者: 陈忠仁:1964年生,博士,教授,主要研究方向为聚合物分子设计与可控聚合、高分子聚集态结构调控与表征、有机纳米材料多尺度加工、高分子复合材料界面设计与调控、高分子疲劳失效机理与寿命预测等 E-mail:chenzr@sustc.edu.cn

作者简介: 王克强:男,1988年生,硕士研究生,研究方向为聚合物共混与流变、高分子物理 E-mail:wwwwkq@yeah.net

引用本文:

王克强, 叶深杰, 王文锦, 付甲, 陈忠仁. 不同共混方式下非对称嵌段共聚物PS-b-PMMA对PCHMA/PMMA
体系增容效果的研究:界面与胶束的竞争^*[J]. 《材料导报》期刊社, 2017, 31(8): 98-103.
WANG Keqiang, YE Shenjie, WANG Wenjin, FU Jia, CHEN Zhongren. Effect of Asymmetric Block Copolymer PS-b-PMMA on the Compatibility of PCHMA/PMMA Blends by Different Blending Methods: Interface vs Micelles. Materials Reports, 2017, 31(8): 98-103.

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

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