Synthesis of Well-defined Telechelic Trans-1,4-polyisoprene by Oxidative Cleavage  

作　　者：zhang luo 姜秀波 wei yao 

机构地区：[1]Key Laboratory of Rubber-Plastics, Ministry of Education, Shandong Provincial, Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

出　　处：《Chinese Journal of Polymer Science》2016年第3期359-366,共8页高分子科学（英文版）

基　　金：financially supported by the Natural Science Foundation of Shandong Province(No.ZR2014BQ022);the National Natural Science Foundation of China(No.51273100);a Project of Shandong Province Higher Educational Science and Technology Program(No.J14LA12)

摘　　要：Synthesis of telechelic trans-1,4-polyisoprenes（TPI： trans-structure ＆gt; 95%） was evaluated based on two different methods of oxidative cleavage（indirect cleavage： first epoxidation of TPI, then the selective cleavage of epoxidized units in epoxidized trans-1,4-polyisoprene（ETPI） and direct cleavage of isoprene units in TPI）. The influence of solvents and the ratio of oxidative agents was investigated by 1H-NMR and 13C-NMR. A series of well-defined telechelic TPI with double terminated functional groups and less side reaction（molecular weight distribution range： 1.96？2.26） were synthesized by indirect cleavage in chloroform. Telechelic TPI showed similar crystallization behavior with TPI and interesting cold crystallization behavior characterized by DSC.Synthesis of telechelic trans-1,4-polyisoprenes（TPI： trans-structure ＆gt; 95%） was evaluated based on two different methods of oxidative cleavage（indirect cleavage： first epoxidation of TPI, then the selective cleavage of epoxidized units in epoxidized trans-1,4-polyisoprene（ETPI） and direct cleavage of isoprene units in TPI）. The influence of solvents and the ratio of oxidative agents was investigated by 1H-NMR and 13C-NMR. A series of well-defined telechelic TPI with double terminated functional groups and less side reaction（molecular weight distribution range： 1.96？2.26） were synthesized by indirect cleavage in chloroform. Telechelic TPI showed similar crystallization behavior with TPI and interesting cold crystallization behavior characterized by DSC.

关 键 词：Trans-1 4-polyisoprene Telechelic polymers Degradation Epoxidization 

分 类 号：O631[理学—高分子化学]