Viscosity Effects in the Radiation-Induced Grafting of Vinyl Monomers on Polyvinylchloride Films.
BISHOP COLL DALLAS TEX
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Radiation-induced grafting rates of styrene on polyvinylchloride PVC film were measured in a series of runs at various styrene concentrations, while holding constant the Hildebrand solubility parameter of the grafting solution, and therefore theoretically also holding internal film viscosity constant. The results show rate apparently proportional to the first power of styrene concentration. The rate data are compared and contrasted with those obtained in earlier grafting studies by Takamatsu on styrenePVC. The rate of acrylonitrile grafting on PVC film was also measured, and overall grafting rates for styrenePVC and acrylonitrilePVC are compared on the basis of the calculated values of rates of initiation, rates of propagation, internal monomer concentrations, and rates of termination. Internal film viscosities for several monomerpolymer systems were estimated using an equation derived by Smoluchowski, and the relation between internal film viscosity and the rate of termination by macroradical interaction is discussed.
- Polymer Chemistry