PSt-g-PEO两亲接枝共聚物溶液的性质

两亲共聚物是指分子结构中同时具有对两种相结构都有亲和性的聚合物，一般指分子结构中同时含有亲油和亲水基团的共聚物，研究两亲共聚物在选择性溶剂中的形态及聚集态结构，对于其作为表面活性剂，增溶剂，生物医药材料，以及固体微胶束的研究都具有重要的理论和实际意义。1-3]／

Solution Property of Amphiphilic Graft Copolymer PSt- g- PEO

The solution property of amphiphilic graft copolymer has been examined by means of NMR,TEM and viscometry. It is found that water and toluene are selective solvent for PSt-g-PEO. When it is dissolved in water, micelle can be formed with hydrophobic PSt backbone as the core and hydrophilic PEO side chains as the shell. On the other hand, in selective solvent toluene, the reversed-micelle can be formed with PEO as core and PSt as the shell. In toluene, with an increase in concentration, the conformation of PSt-g-PEO can be transformed from stretched single molecule to spherical reversed-micelle. The critical micelle concentration(CMC) is determined at different temperature and with the increase of temperature and the content of PEO the reversed-micelle can be formed in lower concentrations.