Sur les causes de l'auto-accélération dans la polymérisation de l'acrylonitrile en masse et en solution

A study of the polymerization of acrylonitrile in bulk and in DMSO solutions has shown that the auto-acceleration in these systems cannot be explained by non-steady-state conditions as usually assumed. It is suggested that the polyacrylonitrile formed in the initial stages of the reaction acts as a matrix onto which the monomer associates to form an oriented molecular complex in which chain propagation is favoured. This assumption conforms with the various results of this investigation.