期刊
CHINESE JOURNAL OF POLYMER SCIENCE
卷 28, 期 5, 页码 715-720出版社
SPRINGER
DOI: 10.1007/s10118-010-9121-y
关键词
Hydroxyl-terminated polybutadiene; Anionic polymerization; 1,4-Unit; Mechanical properties
资金
- Lanzhou Petrochemical Company
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 H-1-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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