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A new technique, based on steady state fluorescence measurements is introduced for studying swelling and dissolution of polymer discs. These discs are formed by free radical polymerization of methyl methacrylate (MMA). Pyrene (Py) was introduced as a fluorescence probe during polymerization. Swelling and dissolution of disc shape poly(methyl methacrylate) (PMMA) samples in chloroform-heptane mixtures...
Films of chitosan glutamate and sodium alginate were obtained by a casting/solvent evaporation method, and crosslinked with their counterions, tripolyphosphate (TPP) and calcium chloride (CaCl 2 ), respectively. The crosslinked films were characterized with respect to the mechanical properties in the dry and wet state, water vapor transmission, water uptake in different media and permeability...
Swelling has long been used in the study of elastomeric networks. Swelling equilibrium data, for a new conductive tri-block rubber vulcanizates in different solvents, were generally analysed by the Flory-Rehner equation simply to obtain a measure of the crosslink density. Moreover, a number of factors which influence the penetration rate of solvents in those blends have been investigated. These are...
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