论文标题
半串联聚合物的nematic混合物中的熵不混合
Entropic Unmixing in Nematic Blends of Semiflexible Polymers
论文作者
论文摘要
具有相同链长但不同持久性长度的半灵性聚合物的二进制混合物分离为两个共存的不同列型相，当溶解溶液的渗透压变化时。分子动力学模拟和密度函数理论预测具有三个点的相图，其中各向同性相的共存具有两个列中相，或者在列中混合物中脱混合的临界点。成分之间局部首选键角的差异驱动了这种不混合，而单体之间没有任何有吸引力的相互作用。
Binary mixtures of semiflexible polymers with the same chain length but different persistence lengths separate into two coexisting different nematic phases when the osmotic pressure of the lyotropic solution is varied. Molecular Dynamics simulations and Density Functional Theory predict phase diagrams either with a triple point, where the isotropic phase coexists with two nematic phases, or a critical point of unmixing within the nematic mixture. The difference in locally preferred bond angles between the constituents drives this unmixing without any attractive interactions between monomers.
