Calorimetric studies of the crystallization of N-nitrophenyl-L-prolinol

Alexander Leyderman; Shi-Xian Qu; Nora Ortega; C. A. Condat

doi:10.1117/12.452397

25 October 2002 Calorimetric studies of the crystallization process of N-nitrophenyl-L-prolinol

Alexander Leyderman, Shi-Xian Qu, Nora Ortega, C. A. Condat

Proceedings Volume 4813, Crystal Materials for Nonlinear Optical Devices and Microgravity Science; (2002) https://doi.org/10.1117/12.452397
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

The crystallization of the N-4-nitrophenyl-L-prolinol (NPP) organic glass was investigated by differential scanning calorimetry (DSC). The results showed the influence of temperature and temporal treatment of the melt on the crystallization processes obtained while cooling from the liquid or d uring heating from the glass state. The behavior of the crystallization kinetics from the glass state was studied under both nonisothermal and isothermal conditions. On the first case, DSC thermograms were recorded at heating rates from 2 to 40^oC/min. The crystallization temperature was found to depend on heating rates. Two crystallization phases have been found during the heating of the sample from the glass-like disordered states in the continuing cycling of DSC. In the second case, isothermal crystallization was observed at temperatures ranging between the glass transition and crystallization points.

Citation Download Citation

Alexander Leyderman, Shi-Xian Qu, Nora Ortega, and C. A. Condat "Calorimetric studies of the crystallization process of N-nitrophenyl-L-prolinol", Proc. SPIE 4813, Crystal Materials for Nonlinear Optical Devices and Microgravity Science, (25 October 2002); https://doi.org/10.1117/12.452397

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