Synthesis and Properties of Hydroxytelechelic Polyisobutylenes by End Capping with tert-Butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane  

作　　者：Jing Li Kang-Da Wu Huang Shan Jing-Han Zhang Ming Zhao Guang-Bi Gong Wen-Li Guo Yi-Bo Wu 

机构地区：[1]College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China [2]Lanzhou Petrochemical Research Center, Petrochina, Lanzhou 730060, China [3]Beijing Key Laboratory of Specialty Elastomer Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China

出　　处：《Chinese Journal of Polymer Science》2019年第9期936-942,共7页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51573020);Beijing Natural Science Foundation (No. 2172022);Scientific Research Project of Beijing Educational Committee (No. KM201810017008);Project of Petrochina (No. kywx-18-002);URT program (No. 2018J00074)

摘　　要：The low-activity cationic monomer tert-butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane was synthesized by Grignard reaction and hydroxyl-protection reaction. Living polyisobutylene chains were initially synthesized by controlled cationic polymerization and then capped with tert-butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane. The hydrolysis of these polyisobutylenes end capped with tert-butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane gave rise to hydroxytelechelic polyisobutylene. NMR analysis confirmed that the hydrolysis was complete. Results also showed that a low polymerization temperature favored the participation of tert-butyl-dimethyl-(4- methyl-pent-4?enyloxy)-silane in the end-capping reaction. Moreover, polyisobutylene-based polyurethane exhibited greater acid resistance than commercial polyurethane.The low-activity cationic monomer tert-butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane was synthesized by Grignard reaction and hydroxyl-protection reaction. Living polyisobutylene chains were initially synthesized by controlled cationic polymerization and then capped with tert-butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane. The hydrolysis of these polyisobutylenes end capped with tert-butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane gave rise to hydroxytelechelic polyisobutylene. NMR analysis confirmed that the hydrolysis was complete. Results also showed that a low polymerization temperature favored the participation of tert-butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane in the end-capping reaction. Moreover, polyisobutylene-based polyurethane exhibited greater acid resistance than commercial polyurethane.

关 键 词：Carbocationic polymerization POLYISOBUTYLENE HYDROLYSIS Polyisobutylene-based polyurethane 

分 类 号：O6[理学—化学]