The surface photooxidation of Styrene/2-(2-Hydroxy-3-Vinyl-5-Methylphenyl)-Benzotriazole copolymers (λ > 300 nm) has been monitored by ESCA. The rate of oxygen uptake is shown to be dependent on the concentration of HVB in the surface. At concentrations < 1% the rate appears to be very similar to that of unstabilised polystyrene and polystyrene stabilised with hydroxy-methylphenyl-benzotriazole as a 0·5% additive. The data indicate that HVB is not capable of photostabilising the surface. Transmission ir data suggest that the bulk material is photostabilised.
An ESCA investigation of the surface photooxidation of Styrene/2-(2-Hydroxy-3-Vinyl-5-Methylphenyl)-Benzotriazole copolymers
BOTTINO, Francesco;POLLICINO, Antonino;RECCA, Antonino
1987-01-01
Abstract
The surface photooxidation of Styrene/2-(2-Hydroxy-3-Vinyl-5-Methylphenyl)-Benzotriazole copolymers (λ > 300 nm) has been monitored by ESCA. The rate of oxygen uptake is shown to be dependent on the concentration of HVB in the surface. At concentrations < 1% the rate appears to be very similar to that of unstabilised polystyrene and polystyrene stabilised with hydroxy-methylphenyl-benzotriazole as a 0·5% additive. The data indicate that HVB is not capable of photostabilising the surface. Transmission ir data suggest that the bulk material is photostabilised.File in questo prodotto:
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