Analysis of glass transition behavior of polymer-salt complexes: an extended configuration entropy model

Article Abstract:

A new molecular thermodynamic model was developed of the glass transition temperatures (T(sub g)) of binary polymer-salt complexes by combining configurational entropy with Guggenheim's form of the Debye-Huckel theory. The model accurately predicts the experimental T(sub g) values of poly(2-ethyl-2-oxazoline) (POZ) complexed with AgBF4, AgClO4, AgCF(sub 3-), SO3 and AgNO3 at various compositions, as obtained by differential scanning colorimetry.

Coordination compounds

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Ornstein-Zernike random-walk approach for polymers

Article Abstract:

A new theory of the thermodynamics and structure of polymer-chain fluids is developed based on relating, in a novel way, polymer-chain structure with random-walk structure in the context of Ornstein-Zernike equations. Both continuum-space and lattice-gas versions of the theory are summarized, and the extension of the theory to a self-consistent Ornstein-Zernike approach (SCOZA) for polymers is given.

Thermodynamics, Chemical equations

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Vapor-solid growth of Sn nanowires: Growth mechanism and superconductivity

Article Abstract:

The fabrication of single-crystalline tin (Sn) nanowires with a noncatalytic and template-free physical vapor deposition (PVD) process and the relevant structural and superconducting characterizations. Magnetization measurements showed that the critical magnetic fields for both Sn nanowires and Sn nanosquares increased significantly as compared to that of bulk Sn.

Magnetic fields, Tin compounds, Chemical properties

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