Citation: Jing Li, Kang-Da Wu, Huang Shan, Jing-Han Zhang, Ming Zhao, Guang-Bi Gong, Wen-Li Guo, Yi-Bo Wu. Synthesis and Properties of Hydroxytelechelic Polyisobutylenes by End Capping with tert-Butyl-dimethyl-(4-methyl-pent-4-enyloxy)-silane[J]. Chinese Journal of Polymer Science, ;2019, 37(9): 936-942. doi: 10.1007/s10118-019-2327-8 shu

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

Jing Li ^1,2 ,
Kang-Da Wu ^1,3 ,
Huang Shan ¹ ,
Jing-Han Zhang ^1,3 ,
Ming Zhao ^1,3,, ,
Guang-Bi Gong ² ,
Wen-Li Guo ³ ,
Yi-Bo Wu ^1,3,,

a.
College of Materials Science & Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
b.
Lanzhou Petrochemical Research Center, Petrochina, Lanzhou 730060, China
c.
Beijing Key Laboratory of Specialty Elastomer Composite Materials, Beijing Institute of Petrochemical Technology, Beijing 102617, China

Corresponding author: Ming Zhao, zhaoming888@bipt.edu.cn Yi-Bo Wu, wuyibo@bipt.edu.cn
Received Date: 13 June 2019
Revised Date: 28 June 2019
Available Online: 24 July 2019

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.
- Carbocationic polymerization,
- Polyisobutylene,
- Hydrolysis,
- Polyisobutylene-based polyurethane
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