Hydrosilylation has been carried out between Si-H terminated polydimethylsiloxanes with narrow molecular weight distribution and protected 3-allyloxy-1,2-propanediol,and after subsequently alcoholyzed,α-{3-[(2,3-dihydroxy)propoxy]propyl}-ω-butyl -polydimethylsiloxanes with varying number of((Si(CH_3)_2-O) unit were obtained.At each step,the produced compounds were carefully characterized.The results showed that each step was successfully carried out and target products were achieved.
Xiao Li Zhan Zhen Huan Luo Qing Hua Zhang Bi Chen Feng Qiu Chen
<正>Polystyrene-styrene/butadiene diblock copolymers were synthesized via reversible addition-fragmentation chain transfer (RAFT) miniemulsion polymerization.During the polymerization process,the molecular weight distribution was narrow and the numerical molecular weight of the copolymers increased with increasing conversion of monomers,which was close to the theoretical.FT-IR and ~1H NMR results indicated that the microstructure of the polymer was mainly 1,4-trans-butadiene with small amount of 1,2-units,and composition in the copolymers was obtained.
Zhen Xi WangQing Hua ZhangYi Tao YuXiao Li ZhanFeng Qiu ChenJi Hai Xiong
