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本文将反相色谱理论与Flory—Huggins似晶格模型理论相结合,从热力学及动力学两个方面研究了不同结构的硝化纤维素(NC)-低分子体系的溶解特性,用反相色谱法(lGC)测定了表征体系相溶性的参数:此保留体积V_g、相互作用参数X_(1 2)~∞、混合溶解热△H_M~∞,并利用这些参数判定了不同体系的相溶性,为聚合物浓溶液理论提供了一定的论证。本文由lGC实验结果结合Ca lvet微量量热计实验结果,对NC的溶解动力学进行了初步索探,论证了NC溶于良溶剂时的基本模型,为聚合物浓溶液体系溶解动力学提供了理论和实验基础。
In this paper, the theory of reversed-phase chromatography coupled with the theory of Flory-Huggins lattice model was used to study the solubility characteristics of different structures of nitrocellulose (NC) -low molecular system from two aspects of thermodynamics and kinetics. (lGC) was used to characterize the solubility of the system. The retention volume V_g, the interaction parameter X_ (1 2) ~ ∞, and the mixed heat of solution ΔH_M ~ ∞ were used to determine the miscibility of different systems. Material concentrated solution theory provides a certain argument. Based on the results of lGC experiment and Ca lvet microcalorimeter, the kinetics of NC dissolution was preliminarily explored. The basic model of NC dissolved in good solvent was demonstrated, which provided the kinetics of the dissolution kinetics of polymer concentrated solution Theoretical and experimental basis.