PHOTOCHROMISM OF NOVEL SPIROOXAZINE .1. INVESTIGATION OF THE PHOTOCOLORATION IN POLYMER-FILMS AND FIBERS

The photocoloration of a novel spirooxazine, 1-[beta-(4-trifluoromethy l piro[indoline-2,3-[3H]-naphtho[2,1-b]-1,4-oxazine] (SO), doped in di fferent polymer films and fibers was studied. The results show that ph otocoloration increased with increasing concentration of spirooxazine in polymer films. The photocoloration rate of spirooxazine in PMMA is faster than that in PS due to the polarity of the polymer films. A gen eral model for the kinetics of photocoloration of spirooxazine in poly mer films is proposed. The results also show that the photocoloration rate of spirooxazine in PET is faster than that in Nylon-6 due to the crystallinity of the polymer fibers.