摘要
An optically active rod coil rod triblock copolymer containing poly(ethylene oxide)(PEO) as the flexible segment and poly{(+) 2,5 bis[4′ ((s) 2 methyl butoxy) phenyl]styrene} (PMBPS) as the rigid segment,PMBPS b PEO b PMBPS,was synthesized via atom transfer radical polymerization.The PMBPS block had a stable helical conformation with an excess of screw sense in solution.The self assembly behavior of the triblock copolymer in dioxane/water mixed solvents was examined by means of TEM and turbidity measurements.The triblock copolymer molecules aggregated when water content in the system was about 2wt%. The higher the initial polymer concentrations,the lower the critical water content.They formed vesicles with highly dispersed outside diameters,but they had a relatively uniform wall thickness of (27±3) nm.
An optically active rod-coll-rod triblock copolymer containing poly(ethylene oxide) (PEO) as the flexible segment and poly {( +)-2, 5-bis [4'-((s)-2-methyl butoxy) phenyl] styrene} ( PMBPS) as the rigid segment, PMBPS-b-PEO-b-PMBPS, was synthesized via atom-transfer radical polymerization. The PMRPS block had a stable helical conformation with an excess of screw sense in solution. The self-assembly behavior of the triblock copolymer in dioxane/water mixed solvents was examined by means of TEM and turbidity measurements. The triblock copolymer molecules aggregated when water content in the system was about 2wt%. The higher the initial polymer concentrations, the lower the critical water content. They formed vesicles with highly dispersed outside diameters, but they had a relatively uniform wall thickness of (27 +/- 3) nm.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2005年第2期305-308,共4页
Acta Polymerica Sinica
基金
国家自然科学基金 (基金号 2 0 2 740 0 1
2 0 3 2 5 415
2 0 13 40 10 )
教育部优秀青年教师教学与科研奖励基金
高等学校博士学科点专项基金 (基金号 990 0 0 13 6)资助项目
