Study of polymer dissolution and diffusion by laser interferometry

Optical Tracking of Anomalous Diffusion Kinetics in Polymer Microspheres

“…Fundamentally, many physical principles can influence the diffusion kinetics, such that differing diffusion regimes have been observed ranging from so-called Fickian (case I) diffusion, in which the rate of penetrant diffusion dominates the kinetics, through anomalous diffusion, to non-Fickian (case II) diffusion governed by polymer relaxation [8,9]. Consequently, both theoretical modeling [10,11] and development of associated experimental techniques, such as Fourier transform infrared attenuated total reflection, nuclear magnetic resonance spectroscopy, fluorescence imaging, laser interferometry, and gravimetry [12][13][14][15][16], have seen long-standing research interest. Comprehensive understanding and control of diffusion kinetics, however, still remains a challenge, such that further means by which to monitor the diffusion process precisely are still of great importance.…”