ビニル単量体をグラフト重合したポリエチレンテレフタレート繊維の耐光性

抄録

Light fastness of poly (ethylene terephthalate) (PET) fibers to which vinyl monomers were grafted by a chemical method was estimated by discoloration due to UV-irradiation. The estimation of discoloration was carried out for undyed or dyed samples.
When monochlorobenzene (MCB) was used as a co-reagent for the grafting, the light fastness of the grafted PET decreased. After extraction of homopolymer or dyeing, however, the amount of MCB remained in the grafted PET became so small as to give a negligible influence of MCB on the light fastness.
It was found that the light fastness of the dyed grafted PET does not depend on the grafting itself and specific light absorbance of the grafted vinyl polymer, but on moisture regain caused by the grafting. Namely, the light fastness of the dyed grafted PET decreased with increasing moisture regain.
The hygroscopic functional groups in the grafted polymer gave a peculiar effect on the decrease of light fastness. The carboxyl group and its metal salt had a tendency to decrease the light fastness more than the amide group. The carboxylic acid salts of transition metals brought particularly low light fastness.