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Crystallization of sucrose glass under ambient conditions: Evaluation of crystallization rate and unusual melting behavior of resultant crystals
Journal of pharmaceutical sciences, 2006-06, Vol.95 (6), p.1354-1363
Kawakami, Kohsaku
Miyoshi, Kyoko
Tamura, Naomi
Ida, Yasuo
Yamaguchi, Tohru
2006
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Kawakami, Kohsaku
Miyoshi, Kyoko
Tamura, Naomi
Ida, Yasuo
Yamaguchi, Tohru
Titel
Crystallization of sucrose glass under ambient conditions: Evaluation of crystallization rate and unusual melting behavior of resultant crystals
Ist Teil von
Journal of pharmaceutical sciences, 2006-06, Vol.95 (6), p.1354-1363
Ort / Verlag
Hoboken: Elsevier Inc
Erscheinungsjahr
2006
Quelle
Wiley-Blackwell Full Collection
Beschreibungen/Notizen
Isothermal crystallization of sucrose glass under ambient condition was investigated by powder X-ray diffraction, isothermal microcalorimetry, and water sorption/desorption analysis. Isothermal microcalorimetry measurements showed that the crystallization behavior was affected by the compression force applied to starting amorphous materials. The crystallization rate was analyzed by X-ray diffraction measurements to establish that the rate could well be explained by the Avrami–Erofeev equation. In the water sorption/desorption analysis, the weight change during the crystallization was elucidated by supposing that desorption proceeded from the crystallized part. The sucrose crystallized at relatively low temperature conditions showed completely different melting behavior from that of intact sucrose, although the crystal form was most likely to be identical. This difference could be explained by defects in the lattice structure produced during the crystallization and the desorption process. Correlation was found between the melting temperature and the water content just before the crystallization. Defects in the crystal structure were partially modified by annealing as has been found in relaxation studies of amorphous materials. © 2006 Wiley-Liss, Inc. and the American Pharmacists Association
Sprache
Englisch
Identifikatoren
ISSN: 0022-3549
eISSN: 1520-6017
DOI: 10.1002/jps.20458
Titel-ID: cdi_proquest_miscellaneous_67926230
Format
–
Schlagworte
annealing
,
Avrami-Erofeev equation
,
Biological and medical sciences
,
Calorimetry, Differential Scanning
,
crystal defects
,
Crystallization
,
desorption
,
General pharmacology
,
Glass - chemistry
,
Medical sciences
,
Microscopy, Electron, Scanning
,
Pharmaceutical technology. Pharmaceutical industry
,
Pharmacology. Drug treatments
,
Sucrose - chemistry
,
Temperature
,
Water - chemistry
,
X-Ray Diffraction
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