Polystyrene-block-poly(n-butyl acrylate)-block-polystyrene Triblock Copolymer Thermoplastic Elastomer Synthesized via RAFT Emulsion Polymerization

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• 作者：Yingwu Luo ; Xiaoguang Wang ; Yue Zhu ; Bo-Geng Li ; Shiping Zhu
• 刊名：Macromolecules
• 出版年：2010
• 出版时间：September 28, 2010
• 年：2010
• 卷：43
• 期：18
• 页码：7472-7481
• 全文大小：974K
• 年卷期：v.43,no.18(September 28, 2010)
• ISSN：1520-5835

文摘

A series of well-controlled polystyrene-b-poly(n-butyl acrylate)-b-polystyrene triblock copolymers were prepared by emulsion polymerization with a carefully designed amphiphilic macroRAFT (reversible addition−fragmentation chain transfer) agent. The triblock copolymers were produced within four hours and only a few percent of dead chains were estimated. Tensile strength of the materials was a function of composition only and it increased linearly with polystyrene composition up to 50 wt %. The ultimate tensile strength reached 10 MPa with an elongation at break of 500% at the polystyrene composition of 40−50 wt %.