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《Materials Review》 2014-04
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Study on Synthesis and Properties of Degradable Polyurethane with Different Proportion of Soft Segment to Hard Segment

HE Xianyun;HE Junyong;WANG Yingjun;WU Gang;YUAN Bo;Department of Mechanical Engineering,Guangdong College of Industry and Commerce;School of Materials Science and Engineering,South China University of Technology;National Engineering Research Center for Tissue Restoration and Reconstruction;  
A two-step method was used to synthesize the degradable PU with L-lysine ethyl ester diisocyanate(LDI)as hard segment,poly(ε-caprolactone)diols(PCL-diol)as soft segment,1,4:3,6-dianhydro-D-sorbitol(Isosorbide)as chain extender.FTIR,1 H-NMR results revealed that the products had typical PU structures.GPC results showed that the synthesized polyurethane had narrow,unimodal molecular weight distribution with the number ave rage molecular weight of more than 50000and a polydispersity of 1.6-2.0.The proportion of soft segment to hard segment had influence on the properties of PU.The crystallinity,tensile strength and hydrophilicity of PU decreased with increasing hard-segment content.
【Fund】: 国家973计划项目(2012CB619105;2011CB606204);; 国家自然科学基金重点项目(50732003;51173053);; 国家青年科学基金(51202069)
【CateGory Index】: TQ323.4
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