Effect of Impurity on Molecular Linking of Irradiated Polymer

抄録

The effect of impurity on cross-linking or end-linking of an irradiated polymer is discussed theoretically. It is shown that the radiation effect on a pure polymer can be found by measuring the intrinsic viscosity and the gel point of an irradiated polymer containing an impurity. The theory is compared with Chapiro’s measurements. One of the important results is that when impurity hinders cross-linking, all the relations between physical quantities of an irradiated polymer containing impurity can be reduced to those of the polymer containing no impurity, if use is made of a reduced radiation dose instead of the real dose. This is not the case for the effect of impurity on end-linking. Such a difference is expected to enable us to distinguish between cross-linking and end-linking.