Synthesis and properties of spiroxazine polymer derived from cyclopolymerization of diallyldimethylammonium chloride and diallylamine

Cyclopolymerization of diallyldimethylammonium chloride and diallylamine containing photochromic spiroxazine was carried out by free radical initiation. The resulting polymer was found to be photochromic in solution and thin solid film. The viscosity of a methanol solution of the polymer was reversively reduced by as much as 5% upon UV irradiation, the initial value being restored in the dark.