物理缔合高分子溶液相分离的研究

Study on physically associating polynur solution phase separation

采用自洽平均场理论研究高分子溶液相分离,研究高分子溶液粘性单体相互作用参数χN与p体积分数相图,分别改变粘性单体间隔、溶剂尺寸研究其对相分离的影响。其结果是随着高分子体积分数p的增大,相分离临界值χN先降低后升高,并且整个相图不对称。减少高分子链粘性单体间隔,相分离临界值χN降低。增大溶剂尺寸,相分离临界值χN降低。

By using self-consistent average field theory, the phase separation of polymer solution system was studied, and monomer mutual parameter X^N and volume fraction Фp phase separation picture in polymer solution were studied. By changing sticker monomer gap and solvent size respectively, its influence for phase separation was studied. The result is that with the increasing of volume fraction Фp , phase separation critical X^N first increases and then reduces;and the entire phase picture are not symmetric. If solvent size is increased, phase separation critical X^N reduces; if sticker gap of polymer chain is reduced, phase separation critical X^N reduces.