Unlocking the Potential of Poly(butylene succinate)through Incorporation of Vitrimeric Network Based on Dynamic Imine Bonds  

作　　者：Shan-Song Wu Hui-Juan Lu Yi-Dong Li Shui-Dong Zhang Jian-Bing Zeng 

机构地区：[1]Chongqing Key Laboratory of Soft-Matter Material Manufacturing,School of Chemistry and Chemical Engineering,Southwest University,Chongqing,400715,China [2]School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou,510640,China

出　　处：《Chinese Journal of Polymer Science》2024年第10期1414-1424,I0006,共12页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51973176);the Chongqing Talent Plan for Young Top-Notch Talents(No.CQYC2021059217);the Fundamental Research Funds for the Central Universities(No.SWUXDJH202314)。

摘　　要：Poly(butylene succinate)(PBS)exhibits many advantages,such as renewability,biodegradability,and impressive thermal and mechanical properties,but is limited by the low melt viscosity and strength resulted from the linear structure.To address this,vitrimeric network was introduced to synthesize PBS vitrimers(PBSVs)based on dynamic imine bonds through melt polymerization of hydroxyl-terminated PBS with vanillin derived imine containing compound and hexamethylene diisocyanate using trimethylolpropane as a crosslinking monomer.PBSVs with different crosslinking degrees were synthesized through changing the content of the crosslinking monomer.The effect of crosslinking degree on the thermal,theological,mechanical properties,and stress relaxation behavior of the PBSVs was studied in detail.The results demonstrated that the melt viscosity,melt strength,and heat resistance were enhanced substantially without obvious depression in crystallizability,thermal stability,and mechanical properties through increasing crosslinking degree.In addition,the PBSVs exhibit thermal reprocessability with mechanical properties recovered by more than 90%even after processing for three times.Furthermore,PBSV with improved melt properties shows significantly improved foamability compared to commercial PBS.This research contributes to the advancement of polymer technology by successfully developing PBS vitrimers with improved properties,showcasing their potential applications in sustainable and biodegradable materials.

关 键 词：Poly(butylene succinate) Vitrimer Imine bonds FOAMABILITY 

分 类 号：TQ317[化学工程—高聚物工业]