A Theoretical Model of Supramolecular SLCP Induced by H-bonds

Abstract

Abstract: The supramolecular SLCP induced by H-bonds is an oriented blend. By introduction of the self assembly into Flory Huggins theory, the free energy of mixing and chemical potential of components in isotropic phase were described. The free energy of mixing and chemical potential of components in nematic phase were calculated based on Maier-Saupe theory. The theoretical model on the equilibrium phase diagram of the oriented blend was thus set up. Direction and saturation of hydrogen bonds in self-assembly determine the capability of Host-Guest complex. This is a balance point at which the supramolecule has the highest stability, the Ti is the highest, so there is a peak in the phase diagram. The factors which affect the capability of the Host-Guest complex balance point are the interaction parameter of hydrogen bonds and carboxyl concentration in the copolymer. The stability increases with increase in interaction parameter of H-bond and carboxyl concentration; furthermore, the peak shifts to a low concentration of low mass molecule. There is a critical value for the molecular weight, which affects the stability of mesophase. Over it, Ti is independent on the molecular weight, and the self-assembly is decoupled completely.

Key words: Hydrogen bonds, Self-assembly, Liquid crystalline molecular theory

CLC Number:

O631

TrendMD:

YAN Hua, LI Bo-Geng, LI Bao-Fang, PAN Zu-Ren. A Theoretical Model of Supramolecular SLCP Induced by H-bonds[J]. Chem. J. Chinese Universities, 2000, 21(11): 1756.

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A Theoretical Model of Supramolecular SLCP Induced by H-bonds

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