嵌段共聚物增容共混聚合物的相形貌及胶束迁移行为研究

材料导报, 2017, 31(4): 100-104. doi: 10.11896/j.issn.1005-023X.2017.04.022

嵌段共聚物增容共混聚合物的相形貌及胶束迁移行为研究

黄林 ^1, , 杨艳琼 ^2, , 余峰 ^3, , 付甲 ^4, , 陈忠仁 ^5,

1.宁波大学材料科学与化学工程学院,宁波,315211

2.宁波大学材料科学与化学工程学院,宁波,315211

3.宁波大学材料科学与化学工程学院,宁波,315211

4.南方科技大学化学系,深圳,518055

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

基金项目: 浙江省科技创新团队子项目(019-E01176124200) 宁波市“3315计划”高端创业创新团队(A类)(2012S0001) 国家自然科学基金(21274070) 浙江省重点科技创新团队(2011R50001)

关键词：聚合物共混 , 嵌段共聚物 , 增容 , 形貌 , 胶束

Morphology and Micelle Migration Behavior of Melt Blend Compatibilized by Block Copolymer

Keywords： polymer blend , block copolymer , compatibilization , morphology , micelle

主要研究了对称性的聚苯乙烯-聚甲基丙烯酸甲酯嵌段共聚物(PS-b-PMMA,简称SM)对聚甲基丙烯酸甲酯/聚甲基丙烯酸环己酯(PMMA/PCHMA)熔融共混体系的增容.采用透射电子显微镜(TEM)表征了SM和PMMA分子量对共混体系微观相形态和胶束迁移行为的影响.研究表明,SM分别在PMMA与PCHMA均聚物中形成不同结构的胶束,当SM在PMMA/PCHMA界面上形成“湿刷”时,SM在PCHMA相中形成的胶束才能迁移到PMMA相中.SM的加入改善了PMMA与PCHMA之间的相容性,但其增容效果取决于SM的分子量.随着分散相PMMA分子量从19 kg/mol增加到39 kg/mol,PMMA粒子的平均粒径逐渐增加.

Symmetric poly(styrene-b-methyl methacrylate) (PS-b-PMMA,SM) block copolymers were utilized to compatibilize poly(methyl methacrylate) and poly(cyclohexyl methacrylate) (PMMA/PCHMA) melt blends.The effect of molecular weight of SM and PMMA on the morphology of mixed blend and migration of micelle in the mixed phase was characterized by transmission electron microscope (TEM).The results showed that micelles with different morphology were formed when SM was blended with PMMA and PCHMA,respectively.When wet brushes were formed by the block copolymer at the interface of the mixed phase,the micelles generated in PCHMA phase were migrated to PMMA phase.SM improved the compatibility of PCHMA and PMMA,but the degree of compatibility mainly depended on the molecular weight of SM.With the increase of PMMA molecular weight from 19 kg/mol to 39 kg/mol,the average particle size of PMMA increased as well.

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