Indexed by:期刊论文

Date of Publication:2022-06-28

Journal:Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering

Volume:37

Issue:4

Page Number:158-165

ISSN No.:1000-7555

Abstract:By using hydroxylated polybutadiene as macromolecular initiator, graft polycaprolactone was synthesized by ring-opening polymerization. The graft structure was determined by 1H-NMR and GPC. A series of crosslinked polymers were synthesized by crosslinking gPCL with hexamethyldiisocyanate (HDI). FT-IR, DSC, WAXD, dynamic thermo-mechanical analysis (DMA), universal stretching machine and other test methods were used to characterize and analyze the microstructure of the crosslinked polymer. The crosslinked polymer has a thermogenic shape memory effect. When the initial shape variable is 50%, the shape fixation rate can reach 99.6%. The shape can be recovered after 12 s with a recovery rate of 98.8%. The introduction of high graft structure makes the shape memory effect of materials more stable. After 5 cycles of shape memory (50% for single shape), the shape fixation rate is still 92.2% and the shape recovery rate is 93.6%. ©2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

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