Relation for solid-liquid coexistence systems and its application to melting point depression of benzene in natural rubber

Article Abstract:

A relation representing solid-liquid coexistence in solvent crystal-noncrystalline polymer systems is deduced theoretically and is expressed as a function of concentration in terms of the interfacial free energy and crystal size. A melting point depression analysis based on the deduced relation was performed by using experimental results on lightly chemically cross-linked natural rubber-benzene systems. The relation is revised by introducing the effects of the application of chain elasticity by swelling, a temperature and composition parameter and the entanglement concept.

Benzene, Rubber

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Complexation chemistry for tuning release from polymer coatings

Article Abstract:

The complexation behavior of two Lewis acids, [Cu.sup.2} and [Zn.sup.2} is investigated by Quartz Crystal Microbalance with Dissipation monitoring technique (QCM-D) and Surface Plasmon Resonance (SPR) on poly(1-vinylimidazole-co-methyl methacrylate) copolymer (PVM) films. From the [super 1]H NMR investigations of solution behavior, it is observed that through losses in signal intensity [Cu.sup.2} interacted substantially with both PVM and Medetomidine.

Plasmons (Physics), Chemical properties

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A frozen tube model of melting point depression of solvents in entangled polymer systems

Article Abstract:

The crystallization of the diluent occurs within the entangled polymer chains, which act as a confining frozen and hard tube involving an unfrozen solvent within. The calculation for two different cases of lightly cross-linked and un-cross-linked rubber mixtures explain the crystal sizes determined by X-ray and NMR measurements for some relevant concentrations.

Methods, Crystallization

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