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中文摘要：
用自洽平均场理论的谱方法研究了双亲三嵌段共聚物PEO—PPO—PEO的分子量对其在水溶液相行为的影响．理论预测了各种溶致液晶相的稳定区域．通过系统地改变聚合物的分子量，我们给出了各种PEO—PPO—PEO三嵌段共聚物在水溶液中的相图．此外，也研究了分子量对自组装结构各组分浓度分布的影响．发现在给定的温度下，聚合物的分子量是体系发生相分离的一个重要驱动力．我们的理论结果与相关的实验很好地符合．
英文摘要：
The effects of the molecular weight on the phase behavior of amphiphilic triblock copolymers PEO-PPO-PEO in aqueous solutions were studied by using the self-consistent mean-field theory formulated in reciprocal space. The theoretical study predicted the stability ranges of various lyotropic liquid crystalline phases. By systematically varying the molecular weight, phase diagrams of several PEO-PPO-PEO triblock copolymers in water were constructed. Moreover, the effects of the block copolymer molecular weight on the volume fraction profiles for the components in the self-assembled structures were investigated. It was found that an increased molecular weight increased the segregation among the components at the given temperature. Good agreements were found between experimental results and theory.
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