Synthesis of HTPB by Anionic Method and Study on Its Microstructure Control

The hydroxyl-terminated polybutadiene(HTPB) was synthesized by anionic polymerization of butadiene with using alkyllithium containing silicon-protected hydroxyl group as initiator.Its main chain microstructure was characterized by 1H-NMR.The effect of concentration of initiator and monomer and tetrahydrofuran on the microstructure of HTPB was discussed,and the influencing mechanism of adding polar additive was analyzed.The results showed that the main chain microstructure could not be influenced by the concentration of initiator and monomer.But the main chain microstructure of HTPB could be controlled by adjusting the amount of tetrahydrofuran which was used as polar additive.