Biodegradable Shape Memory Polyurethanes with Controllable Trigger Temperature  

作　　者：顾书英 Xie-feng Gao Sheng-peng Jin Yan-liang Liu 

机构地区：[1]School of Materials Science and Engineering,Tongji University,Shanghai 201804,China [2]Key Laboratory of Advanced Civil Engineering Materials,Ministry of Education,Tongji University,Shanghai 201804,China

出　　处：《Chinese Journal of Polymer Science》2016年第6期720-729,共10页高分子科学（英文版）

基　　金：financially supported by the National Key Technology R&D Program(No.2012BAI17B05)

摘　　要：A series of random copolymers （PCLAs） were synthesized by ring-opening polymerization of D,L-lactide （LA） and ε-caprolactone （CL） with different molar ratios. PCLA based polyurethanes （PCLAUs） were obtained by chain-extending of PCLA and polytetramethylene ether （PTMEG） with hexamethylene diisocyanate （HDI）. All the PCLAUs exhibit good shape memory properties with high shape fixity ratios above 98% and shape recovery ratios above 82% in the first cycle and 91% in the second cycle. PCLAUs with less CL content show faster recovery speed and PCLAUs with more CL content show higher shape recovery ratio. The trigger temperature can be tuned or controlled around body temperature by adjusting the molar ratio of LA to CL. The PCLAUs have potential applications in implant biomedical devices, especially for minimally invasive deployable devices.A series of random copolymers （PCLAs） were synthesized by ring-opening polymerization of D,L-lactide （LA） and ε-caprolactone （CL） with different molar ratios. PCLA based polyurethanes （PCLAUs） were obtained by chain-extending of PCLA and polytetramethylene ether （PTMEG） with hexamethylene diisocyanate （HDI）. All the PCLAUs exhibit good shape memory properties with high shape fixity ratios above 98% and shape recovery ratios above 82% in the first cycle and 91% in the second cycle. PCLAUs with less CL content show faster recovery speed and PCLAUs with more CL content show higher shape recovery ratio. The trigger temperature can be tuned or controlled around body temperature by adjusting the molar ratio of LA to CL. The PCLAUs have potential applications in implant biomedical devices, especially for minimally invasive deployable devices.

关 键 词：Shape memory POLYURETHANE Trigger temperature Biodegradable. 

分 类 号：TQ317[化学工程—高聚物工业]