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通过 (EOXPOYEOX)型嵌段共聚物有机溶液的水增溶实验研究 ,探讨了溶剂、聚合物结构、离子强度和温度对增溶水量及临界胶团浓度 (CMC)的影响 .研究结果表明 ,正辛醇的加入不仅提高了嵌段共聚物 /对二甲苯体系的最大增溶水量 (Wo ,max) ,而且也增大了体系的CMC值 .lg(1/cmc)随聚合物分子单边EO数X增大而线性递增 ,表明亲水基EO的内聚能变在胶团化过程中起着重要作用 .实验研究范围内 ,溶液离子强度小于 1时 ,对反胶团的增溶作用有利 ,一定程度上增大了胶束粒径 .反胶团临界浓度的自然对数lnXCMC与温度T成线性关系 .胶团化过程是一个自发的放热过程 ,并且是一个混乱度降低的熵减过
The effects of solvent, polymer structure, ionic strength and temperature on the amount of water solubilized and the critical micelle concentration (CMC) were investigated by means of water solubilization experiments of the organic solution of (EOXPOYEOX) block copolymer. The results showed that The addition of octanol not only increased the maximum water solubilization (Wo, max) of the block copolymer / para-xylene system but also increased the CMC value of the system.lg (1 / cmc) The number X increases linearly, indicating that cohesive energy change of hydrophilic EO plays an important role in the process of micellarization.In the experimental range, when the ionic strength of solution is less than 1, the solubilization of reverse micelles is favorable , To a certain extent, increased micellar particle size.The natural logarithm of the critical concentration of reverse micelles lnXCMC has a linear relationship with temperature T. The micellarization process is a spontaneous exothermic process, and is a reduced degree of entropy entropy reduction Too