Abstract
Introducing covalently crosslinked network to polymer matrix can merge the advantages in reprocess-ing and durability of polymers.In this contribution,a series of high-performance vitrimeric elastomers were achieved via polycondensation.The topological structures of polymers were tuned by varying the feeding ratios of bisacetoacetate,hex-substituted bisacetoacetate,bisamine and tris(2-aminoethyl)amine.With these structural manipulations,the vitrimeric elastomers presented great elastic recovery properties(strain recovery value up to 80％)benefiting from the introduction of long chain branch.Furthermore,the elastomers exhibited excellent reprocessing property,water vapor/oxygen barrier and adhesive proper-ties.Specially,the elastomers could be degraded into monomer under acid conditions which enabled the elastomer synthesis again in closed loop recycling system.The ease of the polycondensation in this work to prepare highly elastic and recyclable vitrimeric elastomers demonstrated exciting opportunities for the synthesis of sustainable polymers.
基金项目
国家自然科学基金(21971230)
国家自然科学基金(U19B6001)
国家自然科学基金(22201003)
Excellent Research and Innovation Team Project of Anhui Province(2022AH010001)
Anhui Province Key Laboratory of Environmentfriendly Polymer Materials()
NETL
NSTL
万方数据