Phase Separation Kinetics of Rod/Coil Mixtures
Phase Separation Kinetics of Rod/Coil Mixtures
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DOI：
10.1021/ma960796f
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发表时间：
1996
期刊：
影响因子：
5.5
通讯作者：
Andrea J. Liu;G. Fredrickson
中科院分区：
文献类型：
--
作者：
Andrea J. Liu;G. Fredrickson
运动方程描述的动力学相分离的混合物的棒和线圈到各向同性相丰富的线圈和一个无规相丰富的棒。该方程是使用动态平均场理论推导出来的，只包含一些纯组分参数，如棒和线圈的自扩散系数和分子量。在这样的系统中，组合物和取向密度都随着时间以耦合的方式演变，因此取向顺序的存在对相分离的最后阶段之外的所有域形态都具有显著的影响。这里提出的形式主义将提供深入了解淬火调幅分解过程中产生的双连续聚合物结构的域形态和性能的控制。
Equations of motion are presented that describe the kinetics of phase separation of mixtures of rods and coils into an isotropic phase rich in coils and a nematic phase rich in rods. The equations were derived using dynamical mean field theory and contain only a few pure-component parameters, such as the self-diffusion coefficients and molecular weights of the rods and coils. In such a system, both composition and orientation density evolve with time in a coupled fashion, so the presence of orientational order has a pronounced effect on the domain morphology at all but the latest stages of phase separation. The formalism presented here will provide insights into the control of domain morphology and properties of bicontinuous polymeric structures produced by quenching spinodal decomposition processes.