Two-Fluid Polymer Coordination Solution Theory──Equation of State for Pure Components and Its Applications

Abstract

Abstract: A new model named polymer's two-fluid coordination thermodynamic statisticmodel based on Flory's cell theory coupled with local composition is proposed.The holesimilar to that in the Simha-Socmcynsky hole theory is introduced and two concepts of sitefraction and local site fraction in Flory's theory are replaced by coordination fraction and local coordination fraction.Quasi-chemical treatment is applied to calculate the local coordination fraction.An equation of state of pure components based on the new model is derived andthe P-V-Tproperties of three systems [polystyrene, polypropylene and poly (1-betene3)] ,were correlated by the new equation.The results were fine.According to the relation between segment structure of polymer and holes, we predict that if polymers are similar to eachother in structure, their holes and flow properties of melts decrease with the increase of sizeof subgroup of polymer's segment.

Key words: Polymer, Theory of solution, Equation of state

TrendMD:

JIANG Wen-Hua, LI Hao-Ran, HAN Shi-Jun. Two-Fluid Polymer Coordination Solution Theory──Equation of State for Pure Components and Its Applications[J]. Chem. J. Chinese Universities, 1996, 17(4): 646.

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Two-Fluid Polymer Coordination Solution Theory──Equation of State for Pure Components and Its Applications

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