Amine-catalyzed polycyclotrimerization of arylene bipropiolate: A metal-free and regioselective route to hyperbranched polymer |
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| Authors: | Cathy K W Jim AnJun Qin Jacky W Y Lam JianZhao Liu Matthias Haeussler and Ben Zhong Tang |
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| Institution: | (1) Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China;(2) Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China |
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| Abstract: | This paper presents a new synthetic route to hyperbranched polymer. An arylene bipropiolate monomer,dimethylmethylenebis(1,4-phenylene) bipropiolate,was prepared by a one-step esterification reaction of bisphenol A with propiolic acid. Polycyclotrimrtization of the monomer was effected by reflux in dimethylformamide(DMF),producing a soluble hyperbranched poly(aroxycarbonylphenylene) in a good yield. The polymer was perfectly branched with a degree of branching of 100%. |
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| Keywords: | cyclotrimerization regioselectivity hyperbranched polymer |
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