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A novel synthetic strategy for hydroxyl-terminated polybutadiene containing high cis-1,4 contents based on a Ni(ii)-coordinated anionic initiating system.

ABSTRACT: In this study, novel hydroxyl-terminated polybutadiene (HTPB) with a high cis-1,4 content was developed using a tert-butyl dimethyl siloxy dimethyl propyl lithium (Li)-naphthenate nickel (Ni)-boron trifluoride (B) initiating system (Li-Ni-B). The effects of the material ratio and the addition sequence on the cis-1,4 content and molecular weight of HTPB were studied, and the results were discussed. The optimal Li/Ni ratio was 10 : 1, and the optimal Li/B ratio was 1 : 2. HTPB prepared by the Li-Ni-B system was characterized by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H-NMR) spectroscopy, and 13C nuclear magnetic resonance (13C-NMR) spectroscopy. The results suggested high cis-1,4 contents in HTPB synthesized using Li-Ni-B (cis-1,4 > 95%). The comparison of the cis-1,4 contents in the HTPB samples obtained by anionic polymerization and the Li-Ni-B system revealed the advantages of the latter compared to the former.

SUBMITTER: Min X 

PROVIDER: S-EPMC9075970 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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A novel synthetic strategy for hydroxyl-terminated polybutadiene containing high <i>cis</i>-1,4 contents based on a Ni(ii)-coordinated anionic initiating system.

Min Xin X  

RSC advances 20191129 67

In this study, novel hydroxyl-terminated polybutadiene (HTPB) with a high <i>cis</i>-1,4 content was developed using a <i>tert</i>-butyl dimethyl siloxy dimethyl propyl lithium (Li)-naphthenate nickel (Ni)-boron trifluoride (B) initiating system (Li-Ni-B). The effects of the material ratio and the addition sequence on the <i>cis</i>-1,4 content and molecular weight of HTPB were studied, and the results were discussed. The optimal Li/Ni ratio was 10 : 1, and the optimal Li/B ratio was 1 : 2. HTPB  ...[more]

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