Vitrimers: Associative dynamic covalent adaptive networks in thermoset polymers

编号 020023303

推送时间 20200406

研究领域 林产化工 

年份 2020 

类型 期刊 

语种 英语

标题 Vitrimers: Associative dynamic covalent adaptive networks in thermoset polymers

来源期刊 Chemical Engineering Journal

期 第233期

发表时间 20191216

关键词 Vitrimer;  Self-healing;  Thermoset recycling;  Dynamic covalent bond; 

摘要 The vitrimer-thermoset concept represents an important contribution to improve the durability and recyclability of thermoset-systems. The concept of Associative Dynamic Covalent Adaptive Networks (ADCAN), based on thermosetting vitrimers, demonstrates a high level of stress relaxation, self-healing and shape memory properties. In such a “vitrimer” the dynamically fixed crosslink density allows to reprocess the material without loss of macroscopic properties based via a temperature dependent associative exchange. The overall reprocessing can be achieved by purely associative bond-exchange, controlled by its kinetic profile, adjustable via the used catalysts. This review article describes the relevant associative dynamic covalent exchange reaction mechanisms for vitrimers within thermosetting polymers and summarizes the resulting material properties with a final focus on recent applications. Further demands for increased life-cycle times will speed up the necessity for vitrimer-thermoset-materials, placing these materials in the focus of future material development concepts.

服务人员 尚玮姣

PDF文件 浏览全文