A novel method to measure the glass and melting transitions of pharmaceutical powders


Abiad M. G. , Gonzalez D. C. , MERT B. , Campanella O. H. , Carvajal M. T.

INTERNATIONAL JOURNAL OF PHARMACEUTICS, vol.396, pp.23-29, 2010 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 396
  • Publication Date: 2010
  • Doi Number: 10.1016/j.ijpharm.2010.06.001
  • Title of Journal : INTERNATIONAL JOURNAL OF PHARMACEUTICS
  • Page Numbers: pp.23-29

Abstract

A method to measure thermo-mechanical properties of pharmaceutical and polymeric powders was developed The measurements are conducted by characterizing the material's response to applied acoustic waves Measurements were performed using griseofulvin, felodipine and indomethacin as model drugs and polyethylene oxide (MW 200,000, 900,000, 2,000,000 Da) as model polymers. The method employed measures the mechanical Impedance enabled the calculation of the powder theological and thermo-mechanical properties. Measurements attained with this new technique are compared with measurements made using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The new method detects the melting and glass transitions events while providing complementary information to that provided by DSC and DMA (C) 2010 Elsevier B.V. All rights reserved