Diffusion of dioctyl phthalate into poly(vinyl chloride)

摘要

AbstractDiffusion coefficients were determined gravimetrically for the diffusion of dioctyl phthalate into disks of suspension‐polymerized poly(vinyl chloride) in the temperature range of 65–85°C. After an initial induction period, values ofDwere obtained which ranged from 10−10to 10−8cm.2/sec. and which gave an activation energy of 60 kcal./mole. The diffusion rates showed an inverse dependence on the number‐average molecular weight of the poly(vinyl chloride), indicating that the chain ends are the primary point of attack in the diffusion process below the glass transition t