ANNEALING EFFECT ON MIGRATION OF ACRYLONITRILE MONOMER FROM STYRENE-ACRYLONITRILE COPOLYMER

Survey of volatile substances in kitchen utensils made from acrylonitrile–butadiene–styrene and acrylonitrile–styrene resin in Japan

Residual levels of 14 volatile substances, including 1,3-butadiene, acrylonitrile, benzene, ethylbenzene, and styrene, in 30 kitchen utensils made from acrylonitrile-butadiene-styrene resin (ABS) and acrylonitrile-styrene resin (AS) such as slicers, picks, cups, and lunch boxes in Japan were simultaneously determined using headspace gas chromatography/mass spectroscopy (HS-GC/MS). The maximum r...

Evaluation of styrene-acrylonitrile copolymerization thermal stability and runaway behavior.

Evaluation of thermal stability and runaway behavior of any exothermic chemical system is of great importance for the design and operation of a chemical process. The evaluation process should be based on a thorough investigation of the reaction chemistry including reaction pathways, thermodynamic, and kinetic parameters. When addressing the reactivity hazards of any reacting system, the dominan...

Degradation of acrylonitrile-butadiene-styrene and polycarbonate by UV irradiation

The e€ects of ultra-violet irradiation on the microstructure of an oxygen free polymer viz., acrylonitrile-butadiene-styrene and a polymer containing oxygen viz., polycarbonate have been investigated using positron annihilation lifetime measurement. Lifetime results in both polymers in the early stages of irradiation indicate that chain-scission leading to free radical formation is the predomin...

Application of the Monomer Reactivity Ratios to the Kinetic- Model Discrimination and the Solvent-Effect Determination for the Styrene/Acrylonitrile Monomer System

The impact of reactivity ratios determined with the Nelder and Mead simplex method on the kinetic-model discrimination and the solvent-effect determination for the styrene/acrylonitrile monomer system was investigated. For the monomer system, the penultimate unit effect was inversely proportional to the polarity of the solvent: acetonitrile , N,N-dimethylformamide , methyl ethyl ketone , toluen...

Studies of Migration of Styrene Monomer from Polystyrene Packaging into the Food Simulant