Synthesis and Properties of PS-b-P(DMS-stat-VMS) Block Copolymer

doi:10.7503/cjcu20170014

Abstract

Abstract:

The active block copolymer polystyrene-block-poly(dimethylsiloxane-stat-vinylmethylsiloxane)[PS-b-P(DMS-stat-VMS)] was prepared by reactive anionic polymerization, which was advantageous for diverse chemical modifications for broad practical applications. The chemical structure, molecular weight and morphology of as-prepared copolymer were characterized by FTIR, ¹H NMR, GPC, FESEM and AFM. Meanwhile, the water/diiodomethane contact angle test was utilized to investigate the surface property of the product. The results indicated that the copolymer exhibited narrow molecular weight distribution of 1.37. Owing to the thermodynamic incompatibility between soft and hard domains, the copolymer film prepared by tape casting showed microphase separation structure, and the PDMS-PVMS soft domain was inclined to accumulate on the surface of the film. Moreover, the copolymer exhibited excellent hydrophobicity and low surface energy due to the surface enrichment of PDMS-PVMS soft domain.

Key words: Polydimethylsiloxane, Anionic polymerization, Copolymerization modification, Microphase separation, Polystyrene, Block copolymer

CLC Number:

O631

TrendMD:

LU Zhiwei, CHEN Shun, JU Yanyun, ZHANG Yang, XIONG Chuanxi, DONG Lijie. Synthesis and Properties of PS-b-P(DMS-stat-VMS) Block Copolymer[J]. Chem. J. Chinese Universities, 2017, 38(8): 1484.

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