Recyclable, malleable and intrinsically flame-retardant epoxy resin with catalytic transesterification

编号 020034504

推送时间 20220530

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 Recyclable, malleable and intrinsically flame-retardant epoxy resin with catalytic transesterification

来源期刊 Chemosphere

期 第345期

发表时间 20220501

关键词 Flame retardancy;  Recycling;  Epoxy vitrimers;  Transesterification; 

摘要 Flame retardancy and recyclability are two important issues in the research field of thermosets, particularly for epoxy resin (EP) with the biggest market share. It is of great importance, but rarely achievable, to integrate these properties simultaneously into EP. Herein, we report a facile way to prepare intrinsically flame-retardant epoxy vitrimers combining rapid recycling and multiple shape memory effects by introducing dynamic ester-linkages with catalytic transesterification activity into the crosslinking networks of EP. The flame-retardant epoxy vitrimers exhibited high T-g (similar to 110.7 degrees C), desirable thermal stability and excellent flame retardancy with UL-94 V-0 rating, and high LOI of similar to 34%. Also, the value of the peak heat release rate (PHRR) and the total heat release (THR) showed 63% and 32% reduction, respectively. Meanwhile, flame-retardant epoxy vitrimers showed high malleability that could be reprocessed in 15 min at 200 degrees C without sacrificing the mechanical properties and flame retardancy. Moreover, the dynamic transesterification network allowed flame-retardant EP to access multiple shape memory effect. The design of flame-retardant epoxy vitrimers provide a prime example to foster the cyclic utilization of flame-retardant thermosetting polymers.

服务人员 尚玮姣

服务院士 宋湛谦

PDF文件 浏览全文