聚甲基丙烯酸甲酯接枝聚氧乙烯共聚物溶液性质的研究

采用核磁共振 (NMR)、动态激光光散射 (DLS)、透射电子显微镜 (TEM )等方法研究了规整性聚甲基丙烯酸甲酯接枝聚氧乙烯共聚物溶液性质 ,研究表明两亲接枝共聚物在选择性溶剂中可形成球状胶束 ,溶液的浓度、温度和聚合物结构等因素影响其胶束的大小、形态

STUDY ON SOLUTION PROPERTIES OF AMPHIPHILIC GRAFT COPOLYMER PMMA-g-PEO

The micellization of amphiphilic graft copolymer PMMA g PEO in selective solvents has been examined by means of NMR,TEM,DLS and viscometry.It has been found that the amphiphilic graft copolymer has a strong surfactant activity;in chloroform,the copolymer is dissolved in a stretched polymer conformation;however, the graft copolymer forms a reversed\|micelle in selective solvent toluene and a micelle in water.Micelle formation of PMMA g PEO in selective solvents is strongly dependent on concentration,temperature,polymer structure etc..Moreover,it has been found that the reversed\|micelles are of a spherical structure in shape,the diameter of the reversed\|micelles is increased with increasing the concentration of amphiphilic graft copolymer PMMA g PEO in selective solvent toluene,the hydrophilic graft chains PEO can form a dense coil through hydrophilic interactions, with the hydrophobic backbone facing outwards forming a hydrophobic shell.