文献类型：期刊文献

英文题名：Assembly of triblock copolymer brush at glass fiber/polystyrene interface and its effect on interfacial shear strength

作者：Li, Yin[1];Lin, Qunfang[2];Chen, Lingxia[1];Zhou, Xiaodong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：69

期号：11-12

起止页码：1919

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20092612154819);WOS:【SCI-EXPANDED(收录号:WOS:000268522500032)】；

基金：The authors sincerely acknowledge the support of NSFC (50003003).

语种：英文

外文关键词：Coupling agents; Glass fibers; Polymer-matrix composites; Interface strength; Polymer brush

摘要：To control the interfacial structure of glass fiber-reinforced composites, triblock copolymer coupling agents polystyrene-block-poly(n-butylacrylate)-block-poly(gamma-methacryloxypropyltrimethoxysilane), (PS-b-PnBA-b-PMPS) were synthesized by atom transfer radical polymerization, then were chemically grafted on the glass fiber surfaces with a sufficiently high grafting density. When the grafted glass fibers are embedded in polystyrene (PS) matrix melt, copolymer brushes assemble at the interface of glass fiber/PS system to form the hemispherical domain morphology, where PnBA blocks form the inner core collapsing on fiber surface, while the outer layer PS blocks shield the PnBA blocks from PS homopolymer melt and entangle with the molecular chain of PS homopolymer. The influence of molecular architecture and organization of triblock copolymer coupling agents on the interfacial shear strength of glass fiber/PS system was investigated by means of Microbond Test. It is found that an increase in the PS block lengths is of advantage to the interfacial shear strength. A PnBA block length about the degree of polymerization (DPn) of 50 is desirable for the interfacial shear strength. (C) 2009 Elsevier Ltd. All rights reserved.