Title :
Aqueous diffusion in porous polymer powder compacts studied by terahertz pulsed imaging
Author :
Yassin, Samy ; Hungyen Lin ; Gladden, Lynn F. ; Zeitler, J. Axel
Author_Institution :
Dept. of Chem. Eng. & Biotechnol., Univ. of Cambridge, Cambridge, UK
Abstract :
Terahertz pulsed imaging (TPI) was used to analyse the diffusion of water into hydroxypropyl methyl cellulose (HPMC) matrices as well as acrylate copolymer matrices in reflection. Using TPI it is possible to monitor the phase changes that occur in the polymer matrix, investigate the growth kinetics of the process as well as follow the water diffusion front as it propagates through the porous polymer matrix.
Keywords :
diffusion; polymers; porous materials; powders; terahertz wave imaging; terahertz wave spectra; H2O; acrylate copolymer matrices; aqueous diffusion; hydroxypropyl methyl cellulose; porous polymer powder; terahertz pulsed imaging; Force; Imaging; Kinetic theory; Pharmaceuticals; Polymers; Reflection; Refractive index;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665798
