Synthesis and characterization of hydroxyl-terminated butadiene-end-capped polyisobutylene and its use as a diol for polyurethane preparation |
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| Authors: | Kangda Wu Yibo Wu Shan Huang Zhifei Chen Hao Wang Yuwei Shang Shuxin Li |
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| Affiliation: | Beijing Key Lab of Special Elastomeric Composite Materials, Department of Materials Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617 China.; College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029 China.; Beijing Key Lab of Special Elastomeric Composite Materials, Beijing 102617 China |
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| Abstract: | Hydroxyl-terminated telechelic polyisobutylene (PIB) was prepared through living cationic polymerization. A living PIB chain was formed using the t-Bu-m-DiCuOMe/TiCl4 initiating system and then capped with 1,3-butadiene (BD) to prepare chlorine-terminated telechelic PIB. The chlorine-terminated telechelic PIB was then hydrolysed with tetrabutylammonium hydroxide to form hydroxyl-terminated PIB. Nuclear magnetic resonance spectroscopy confirmed hydrolysis completion. The hydroxyl-terminated PIB was subsequently used as a diol to react with 4,4-methylenebis(phenylisocyanate) (MDI) and produce a PIB-based polyurethane, which showed stronger acid resistance, hydrolysis stability and thermal oxidation stability than a commercial polyurethane.We synthesised hydroxyl-terminated PIB through living cationic polymerisation. Then the hydroxyl-terminated PIB was subsequently used as a diol to produce a PIB-based polyurethane. |
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