Linear-shaped hydroxyl-terminated polybutadiene (L-HTPB) was synthesized by living anionic polymerization of butadiene

using self-made alkyllithium containing tert-butyldimethylsilyloxy propyllithium as initiator and cyclohexane as solvent.On this basis

star-shaped hydroxyl-terminated polybutadiene (S-HTPB) was synthesized by living anionic polymerization of butadiene

using methyltrichlorosilane as coupling agent.The polymers were characterized by GPC and 1H-NMR.The results show that the micro-structures of polybutadienes are similar

the average functionalities of linear-shaped hydroxyl-terminated polybutadiene is more than 1.9 and the average functionalities of star-shaped hydroxyl-terminated polybutadiene is more than 2.8 that fit for design values.In addition

the microstructure of the polymer main chain could be controllable through regulating the radio of tetrahydrofuran and cyclohexane.The results show that with the increase of cyclohexane content in mixed solvents

the relative content of 1

4-units increased gradually

especially the cis-1

4-units increased with obvious trend.The content of 1

4-units is more than 90%

the content of cis-1

4-units reaches up to 70% and the content of 1

2-units is about 5.70% in the polymer main chain when cyclohexane is used as the single polymerization solvent.On the contrary

the content of 1

2-units is more than 90%

the content of cis-1

4-units tends to 0

and the sample exhibits the performance of plastics when tetrahydrofuran is used as the single polymerization solvent.