Study of diffusion of compounds of anthracene structure in polymethyl methacrylate by holographic relaxometry

Length Scale Dependent Probe Diffusion in Drying Acrylate Latex Films

“…A technique fulfilling these requirements is forced Rayleigh scattering (FRS), a holographic method which allows one to measure the tracer diffusion coefficient of a photoreactive dye molecule or of species that are labeled by it through chemical attachment. The technique is particularly suited to monitor slow diffusion processes covering diffusion coefficients in the range 10 -13 −10 -21 m 2 s -1 and has been successfully used in the past to study polymer diffusion in melts, colloid diffusion in highly concentrated dispersions, and the role of small molecule additives in polymers − as well as diffusion close to and below the glass transition temperature. − In recent studies of block copolymer melts its applicability to diffusion in heterogeneous systems has been shown. − …”

“…The technique is particularly suited to monitor slow diffusion processes 23 covering diffusion coefficients in the range 10 -13 -10 -21 m 2 s -1 and has been successfully used in the past to study polymer diffusion in melts, 24 colloid diffusion in highly concentrated dispersions, 25 and the role of small molecule additives in polymers [26][27][28] as well as diffusion close to and below the glass transition temperature. [29][30][31][32][33] In recent studies of block copolymer melts its applicability to diffusion in heterogeneous systems has been shown. [34][35][36][37][38][39] In this report, we want to demonstrate that FRS can be profitably applied to nascent films formed on drying aqueous dispersions of polymer colloids, allowing one to quantitatively follow the drying process and the concomitant changes of transport properties of the polymer phase and the hydrophilic interface by a twostate diffusion model.…”

Surface modification on PMMA : PVDF polyblend: hardening under chemical environment

“…Polymeric materials have a specific feature of stability towards various aggressive chemical environments, which depends on a multiplicity of factors like structure and nature of the polymers and chemical media as well as on the time and temperature of exposure. The influence of chemical environment on polymers include the surface alteration as well as other deep modifications in surface layer (Lashkov et al 1986;Krupenya et al 1988Krupenya et al , 1989. The studies on environmentally affected mechanical behaviour of polymers are reported by several workers (Kojima and Satake 1984;Omar et al 1986;Wu and Brown 1986;Pandey et al 1990;Maccone et al 2000).…”