Some Physico-Chemical Aspects of Polymeric Liquid Crystals

摘要: Apart from their obvious macroscopic differences that follow respective molecular dynamical differences, ordinary liquids are readily distinguished solids on a microscopic scale by the absence of long-range translational and orientational order. Nevertheless, one frequently refers to “structure” in liquids: short-range, near-neighbor spatial angular correlations which, specific intermolecular interactions (e.g. dipolar, hydrogen bonding, etc.) facilitate “packing” molecules at liquid densities.(1) Such may be somewhat more exaggerated composed anisometric with high aspect ratios (rod-or disclike molecules), but even such fluids correlation lengths rarely exceed very few (two or three) dimensions.