Synthesis and shape memory behavior study of hyperbranched poly(urethane-tetrazole)

作     者：QIAO LiGen ASIF Anila SHI WenFang 

作者机构：CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 China Interdisciplinary Research Centre in Biomedical Materials COMSATS Institute of lnformation Technology Defence Road Off Raiwind Road Lahore 54000 Pakistan 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2011年第54卷第9期

页      面：1461-1467页

核心收录：

学科分类：0832[工学-食品科学与工程（可授工学、农学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0836[工学-生物工程] 082203[工学-发酵工程] 0822[工学-轻工技术与工程] 083203[工学-农产品加工及贮藏工程] 

基　　金：support of the National Natural Science Foundation of China (50633010) is gratefully acknowledged 

主　　题：synthesis hyperbranched poly(urethane-tetrazole) shape memory behavior thermal property 

摘      要：A novel hyperbranched poly(urethane-tetrazole)(HPUTZ) was synthesized via the A2+BB2 approach using hexadiisocyanate(HDI) and 3-(bis-(2-hydroxyethyl)) aminopropyltetrazole(HAPTZ).The molecular structure was characterized by FTIR and 1H NMR *** number average molecular weight was measured to be 1.05×104 g/mol with a polydispersity of 1.27 by GPC *** HPUTZ was further cured by the semi-adduct(PEG-IPDI) from polyethylene glycol(PEG) reacting with isophorone diisocyanate(IPDI) to form the crosslinked HAPTZ-PU film in different ratio of HAPTZ to *** glass transition temperature of HAPTZ-PU increased from 44.9 to 56.4 ℃ as the HPUTZ content increased from 20% to 33% from the DSC *** DMA results indicated that the HPUTZ-PU with 20% HPUTZ possessed the highest storage modulus and loss ***,the storage modulus increased with the increasing of HPUTZ segment at higher *** shape memory study showed that all the films presented the excellent shape memory *** 98% shape recovery could be obtained for the HAPTZ-PU with 20%-33% HAPTZ segment content within 60 s in the tension deformation test and within 40 s at 80 ℃ in the bend deformation test.