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Rheology and molecular mobility of amorphous blends of citric acid and paracetamol

โœ Scribed by Pekka Hoppu; Sami Hietala; Staffan Schantz; Anne Mari Juppo

Book ID
116438039
Publisher
Elsevier Science
Year
2009
Tongue
French
Weight
303 KB
Volume
71
Category
Article
ISSN
0939-6411

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A solid-state NMR study of phase structu
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โœ S. Schantz; P. Hoppu; A.M. Juppo ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 178 KB

Citric acid anhydrate (CAA) and paracetamol (PARA), prepared as crystalline physical mixtures and as amorphous blends, were studied using (13)C solid-state cross polarization magic angle spinning (CPMAS) NMR. Amorphous blends showed significant line broadening from the conformational distribution as

Characterization of ultrasound extrudate
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The purpose of the present work was to study the effect of ultrasound extrusion and cutting on the physical stability of a viscous and sticky supercooled melt containing (50/50, w/w, %) citric acid anhydrate and paracetamol. Samples were extrudated at temperatures of 50, 60, and 708C using power lev