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Proceedings Paper

Calorimetric studies of the crystallization of N-nitrophenyl-L-prolinol
Author(s): Alexander Leyderman; Shi-Xian Qu; Nora Ortega; C. A. Condat
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Paper 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 40oC/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.

Paper Details

Date Published: 25 October 2002
PDF: 8 pages
Proc. SPIE 4813, Crystal Materials for Nonlinear Optical Devices and Microgravity Science, (25 October 2002); doi: 10.1117/12.452397
Show Author Affiliations
Alexander Leyderman, Univ. of Puerto Rico (United States)
Shi-Xian Qu, Univ. of Georgia (United States)
Nora Ortega, Univ. of Puerto Rico (United States)
C. A. Condat, Univ. of Puerto Rico (United States)


Published in SPIE Proceedings Vol. 4813:
Crystal Materials for Nonlinear Optical Devices and Microgravity Science
Ravindra B. Lal; Donald O. Frazier; Narayanan Ramachandran, Editor(s)

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