以BPO引发苯乙烯反向ATRP水分散体系中催化剂、乳化剂等在水/油两相分配系数的测定  

PARTITION COEFFICIENTS OF CATALYST AND EMULSIFIER BETWEEN STYRENE PHASE AND WATER PHASE IN REVERSE ATOM TRANSFER RADICAL EMULSION POLYMERIZATION SYSTEM OF STYRENE INITIATED BY BPO

作　　者：高楠[1] 胡春圃[2] 应圣康[2] 

机构地区：[1]上海应用技术学院材料工程系,上海200233 [2]华东理工大学活性聚合实验室,上海200237

出　　处：《高分子学报》2007年第11期1028-1034,共7页Acta Polymerica Sinica

摘　　要：在以过氧化二苯甲酰(BPO)为引发剂、1,10-邻二氮菲(phen)为催化剂配体、十二烷基磺酸钠(SLS)为乳化剂,水分散体系中进行的苯乙烯(St)的反向原子转移自由基聚合体系中,系统地分析了CuBr2/phen络合物、CuBr/phen络合物、SLS和phen在St/水两相中的分配行为,发现CuBr2/phen络合物、CuBr/phen络合物的两相分配系数对温度有一定的依赖性,结合所得的两相分配系数,从理论上分析了CuBr/CuBr2/phen/BPO乳液聚合体系中的"活性"/可控乳液聚合活性种的数目,较详细的讨论了水分散体系中反向ATRP反应的机理,并通过分相后的本体聚合实验,佐证了测得的催化体系的两相分配系数具有一定的指导意义.The partitions coefficients of Cu（ T ）/phen, Cu（ 11 ）/phen. SIS and phen between the styrene （St） phase and water phase were measured respectively in the reverse atom transfer radical polymerization reaction system of styrene initiated by benzoyl peroxide （BPO） with phenanthroline （phen） as ligand and sodium lauryl sulfate as surfactant.The results indicated that the partition behavior of Cu（ T ）/phen and Cu（ 11 ）/phen could be affected by the temperature. Based on the partition coefficients measured, the number of controlled active species in the CuBr/ CuBrJphen/BPO reverse ATRP emulsion polymerization system was theoretically calculated, and the reaction mechanism of reverse ATRP was discussed in detail. Though the bulk polymerization after the catalyst partitioning between the St phase and the water phase, we proved that the calculated results was reasonable.

关 键 词：反向原子转移自由基聚合 苯乙烯 分配系数 

分 类 号：O643.32[理学—物理化学]