Radiation-Induced Graft Polymerization of Acrylonitrile onto Poly(vinyl chbride) Film

Abstract

The effects of film thickness upon the graft polymerization of acrylonitrile onto poly(vinyl chloride) film ranging from 0.3 to 0.007 mm were studied by simultaneous irradiation technique with 2 MeV electron beam at room temperature.
The reaction rate was observed to increase with the reaction time at the initial stage, and then decrease in a following stage. A remarkable heterogenity of the graft concentration distribution was alse observed at the cross section of the grafted films.
These phenomena were shown to be caused by the change of the internal monomer concentration which is determined by the difference of the consumption rate of monomer in the films and the diffusion from the surface.