Ionic liquids: A New Route for the Design of Epoxy Networks

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• 作者：Thi Khanh Ly Nguyen ; Sébastien Livi ; Bluma G. Soares ; Sébastien Pruvost ; Jannick Duchet-Rumeau ; Jean-Fran?ois Gérard
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：February 1, 2016
• 年：2016
• 卷：4
• 期：2
• 页码：481-490
• 全文大小：594K
• ISSN：2168-0485

文摘

A new way to synthesize epoxy networks was reported in this work using phosphonium based ionic liquids combined with phosphinate, carboxylate, and phosphate counteranions. The influence of the chemical nature of the anions was investigated on the polymerization kinetics of epoxy systems as well as the thermal and mechanical properties of epoxy–IL networks. In all cases, ILs displayed a high reactivity toward epoxy prepolymer and led to the formation of poly epoxy networks with high epoxy group conversion, i.e., up to 90%. In addition, epoxy–IL networks have high hydrophobicity and an excellent thermal stability (above 350 °C) under N₂ with the glass transition temperatures (T_g) ranging from 90 to 140 °C depending on the chemical structure of ILs. For the first time, the mechanical properties of epoxy–IL networks were also evaluated in terms of flexural properties and fracture toughness (K_Ic).