Total attenuated reflection infrared analysis of silicon-stabilized tri-calcium phosphate

Article Abstract:

Bioceramics based on silicon stabilized tricalcium phosphate are investigated by attenuated total reflection infrared spectroscopy using an experimental preparation that ensures consistent high-quality spectral data. Phase normalized measurement show that changes in OH bands are primarily due to a decrease in the hydroxyapatite content, however, a band at 945 cm(super -1) associated with dehydration of the apatite is visible and correlated with silicon doping.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Calcium Phosphates, Spectra, Properties, Structure, Calcium phosphate, Dehydration (Chemical process)

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Liquid-crystalline phase development of a mesogen-jacketed polymer-application of two-dimensional infrared correlation analysis

Article Abstract:

The study of the mechanism of the liquid crystalline (LC) phase development in PMPCS, a typical kind of mesogen-jacketed liquid-crystalline polymers (LCPs), is presented using two-dimensional IR correlation analysis. It is concluded that before the phase transition, the conformational change of individual side chains occurs sooner than that of the backbone due to the larger motional freedom of the side chains.

Chemical synthesis, Linear free energy relationship

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Liquid-crystalline phase development of a mesogen-jacketed polymer-application of two-dimensional infrared correlation analysis

Article Abstract:

The study of the mechanism of the liquid crystalline (LC) phase development in PMPCS, a typical kind of mesogen-jacketed liquid-crystalline polymers (LCPs), is presented using two-dimensional IR correlation analysis. It is concluded that before the phase transition, the conformational change of individual side chains occurs sooner than that of the backbone due to the larger motional freedom of the side chains.

Phase transformations (Statistical physics), Polymer liquid crystals, Phase transitions (Physics), Liquid crystalline polymers

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