Epoxy resins toughened with in situ azide–alkyne polymerized polysulfones |
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| Authors: | Wu Bin Ying Da Som Moon Min Woo Lee Na Yeong Ko Nho Hoon Kwak Bumjae Lee Jin Zhu Ruoyu Zhang |
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| Affiliation: | 1. Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China;2. Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University, Yuseong‐gu, Daejeon 305‐764, KoreaW. B. Ying and H. S. Yang contributed equally to this work.;3. Department of Fine Chemical Engineering and Applied Chemistry, Chungnam National University, Yuseong‐gu, Daejeon 305‐764, Korea |
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| Abstract: | To simultaneously improve the fracture toughness and heat resistance of a cured toughened epoxy resin along with a reduction in its viscosity during the mixing process, two novel polysulfone‐type polymers are synthesized via azide–alkyne polymerization for use as toughening agents. The epoxy resin toughened with these polymers by in situ azide–alkyne polymerization during the cure process, which shows excellent processibility and based on the significantly lower viscosity (61 and 62 cP) during epoxy mixing process than that of commonly commercial polyethersulfone (PES, 127,612 cP). The novel polysulfone‐type polymer toughened epoxy resin showed the advantage in excellent fracture toughness than the PES toughened epoxy. In addition, the glass transition temperature of the novel polysulfone‐type polymer toughened epoxy resin is similar to that of the neat one (～230 °C) and does not decrease, which implies excellent heat resistance of the toughened epoxy. These phenomena can be attributed to the formation of semi‐interpenetrating polymer networks comprising the epoxy network and the linear polysulfone‐type polymers. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 45790. |
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| Keywords: | blends copolymers resins thermosets |
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