聚合物分散液晶的相分离和凝胶化

H Nakazawa , S Fujinami , M Motoyama , T Ohta , T Araki , H Tanaka , T Fujisawa , H Nakada , M Hayashi , M Aizawa
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引用次数: 23

摘要

通过二维计算机模拟研究了聚合物分散液晶中聚合诱导的相分离。通过求解局部体积分数和向列阶参数的耦合方程组,考虑了粘弹性效应和聚合引起的凝胶作用,研究了相分离引起的畴形态。对比温度淬火相分离的形貌,发现粘弹性效应和凝胶作用使富聚合物相在聚合物组分较少的情况下也能形成稳定的互联结构域。并给出了与这一特征相一致的实验证据。
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Phase separation and gelation of polymer-dispersed liquid crystals

Polymerization-induced phase separation in polymer-dispersed liquid crystal is studied by computer simulations in two dimensions. The domain morphology resulting from phase separation is investigated by solving the coupled set of equations for the local volume fraction and the nematic order parameter, taking into account the viscoelastic effects and gelation due to polymerization. Comparing the morphology of phase separation by temperature quench, it is shown that the viscoelastic effects and gelation enable the polymer-rich phase to form a stable interconnected domain even when the polymer component is minority. The experimental evidence consistent with this characteristic feature is also given.

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