基于分子内氢键的增强型生物基环氧类玻璃高分子研究

Synthesis and performance of enhanced biobased epoxy vitrimers based on intramolecular hydrogen bonding

生物基类玻璃高分子(vitrimers)是一种创新的可再生聚合物,具有广阔的应用前景。但由于其力学性能与重塑能力的互斥以及在制备过程中使用催化剂,使其应用受到了限制。针对vitrimers难以兼顾结构刚性和重塑能力,制备了含分子内氢键的生物基无催化剂环氧vitrimers,并对其热、力学性能及再加工性能进行表征。结果表明,随着分子内氢键结构增加,vitrimers的Tg及力学性能提高且再加工性能优异,证明了分子内氢键诱导的vitrimers兼顾了结构刚性和重塑能力,为vitrimers发展提供了新思路。

The bio-based vitrimers is an innovative renewable polymer with promising applications.However,its application is limited due to the mutual exclusion of its mechanical properties and remodeling capabilities and the use of catalysts in the preparation process.In response to the difficulty of balancing structural rigidity and remodeling ability of vitrimers,the catalyst free bioepoxy vitrimers containing intramolecular hydrogen bonds was synthesized,and their thermal properties,mechanical properties and reprocessing properties were characterized.The results showed that with the increase of intramolecular hydrogen bonding structure,the Tg and mechanical properties of vitrimers were improved,and the reprocessing performance was excellent.It was proved that the intramolecular hydrogen bonding induced vitrimmers balance structural rigidity and remodeling ability,providing new ideas for the development of vitrimmers.