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Batch emulsion copolymerizations of butadiene, methyl methacrylate (MMA), methacrylic acid (MAA) and hydroxyethyl methacrylate were performed in RC1e reactor, and the product vulcanized to form a film typical of those used for barrier products (gloves and condoms). The water vapour transmission (WVT) or breathability and physical properties (such as tensile strength and elongation at break) of the...
The kinetics of acrylamide (AAm) free radical polymerization at low conversion of monomer to polymer in the aqueous phase was investigated at 50°C using γ-radiolysis relaxation, which is sensitive to radical-loss processes. The values of the termination rate coefficients for AAm ranged from 8×10 6 to 3×10 7 M −1 s −1 as the weight fraction of polymer ranged from 0.002...
Electron spin resonance (e.s.r.) spectroscopy should be useful for the measurement of propagation rate coefficients (k p ) in free radical polymerisations, since the propagating radical concentration can be directly observed. However, in previous studies, k p values have generally been inconsistent, and disagreed with data from other accepted experimental techniques, such as pulsed...
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