Molecular Mobility and Fragility in Indomethacin: A Thermally Stimulated Depolarization Current Study

被引:0
作者
Natália T. Correia
Joaquim J. Moura Ramos
Marc Descamps
George Collins
机构
[1] Centro de Química-Física Molecular,Laboratoire de Dynamique et Structure des Matériaux Moléculaires
[2] Complexo I,undefined
[3] IST,undefined
[4] UFR Physique,undefined
[5] TherMold Partners,undefined
[6] L.P.,undefined
来源
Pharmaceutical Research | 2001年 / 18卷
关键词
glass transition relaxation; secondary relaxations; glassy state; amorphous state;
D O I
暂无
中图分类号
学科分类号
摘要
Purpose. To show that thermally stimulated depolarization currents (TSDC), which is a dielectric experimental technique relatively unknown in the pharmaceutical scientists community, is a powerful technique to study molecular mobility in pharmaceutical solids, below their glass transition temperature (Tg). Indomethacin (Tg = 42°C) is used as a model compound.
引用
收藏
页码:1767 / 1774
页数:7
相关论文
共 48 条
[1]  
Hancock B. C.(1997)Characteristics and significance of the amorphous state in pharmaceutical systems J. Pharm. Sci. 86 1-12
[2]  
Zografi G.(1999)The relevance of amorphous state to pharmaceutical dosage forms: glassy drugs and freeze dried systems Int. J. Pharm. 179 179-207
[3]  
Craig D. Q. M.(1999)Characterization of the time scales of molecular motion in pharmaceutically important glasses J. Phys. Chem. B 103 4113-4121
[4]  
Royal P. G.(1997)Molecular mobility of supercooled amorphous indomethacin, determined by dynamical mechanical analysis Pharm. Res. 14 410-414
[5]  
Kett V. L.(1998)The molecular mobility of supercooled amorphous indomethacin as a function of temperature and relative humidity Pharm. Res. 15 835-842
[6]  
Hopton M. L.(2001)An investigation into the thermal behaviour of an amorphous drug using low frequency dielectric spectroscopy and modulated temperature differential scanning calorimetry J. Pharm. Pharmacol. 53 41-48
[7]  
Shambling S. L.(2000)Crystal nucleation and growth of indomethacin polymorphs from the amorphous state J. Non-Cryst. Solids 271 236-248
[8]  
Tang X.(1995)Some considerations about the analysis of thermostimulated depolarisation peaks J. Phys. D: Appl. Phys. 28 1478-1487
[9]  
Chang L.(2000)Molecular motions in molecular glasses as studied by thermally stimulated depolarisation currents (TSDC) Chem. Phys. 252 151-163
[10]  
Hancock B. C.(2000)Glass transition relaxation and fragility in a side-chain liquid crystalline polymer: a study by TSDC and DSC Polymer 41 2907-2914