Abstract
The hydroxyl-terminated polybutadiene (HTPB) possessing high content of 1,4-units was synthesized by anionic polymerization of butadiene, using alkyllithium containing silicon-protected hydroxyl group as initiator and cyclohexane as solvent. The polymers were characterized by GPC, IR and 1H-NMR. The mechanical properties of cured films were also evaluated. The results show that the content of 1,4-units for HTPBs made by anionic polymerization reaches up to 90%. The molecular weight distribution is very narrow (≤ 1.05). The functionality of hydroxyl groups approaches 2. Compared with free radical HTPB, the elongation at break of anionic HTPB films increased by 70%, while the tensile strength remained nearly unchanged. This new HTPB can be very useful in solid propellant.
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This work was financially supported by the Lanzhou Petrochemical Company.
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Chen, Jm., Lu, Zj., Pan, Gq. et al. Synthesis of hydroxyl-terminated polybutadiene possessing high content of 1,4-units via anionic polymerization. Chin J Polym Sci 28, 715–720 (2010). https://doi.org/10.1007/s10118-010-9121-y
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DOI: https://doi.org/10.1007/s10118-010-9121-y