硬質塩化ビニルフィルムに対する硫酸の拡散と化学作用

抄録

An experimental study was carried out of the diffusion and the chemical reaction of sulphuric acid in rigid polyvinyl chloride film in the range of 4080°C. The reaction in PVC film was mainly dehydrochlorination due to catalytic action of sulphuric acid. The formation of carbonyl group and the reaction of cross-linking were also confirmed. The dehydrochlorination proceeded comparatively with the diffusion of sulphuric acid and its amount reached 0.96. In addition, the dehydrochlorination largely depended on the concentration of sulphuric acid. It did not occur below 83 wt%. The results can be explained qualitatively in view of the dissociation mechanism of sulphuric acid.