Condensation of poly(4‐vinylacetophenone) with various araldehydes

The preparation of condensation products of poly(4‐vinyl‐acetophenone) with various substituted benzaldehydes is described. As in the case of the products obtained by condensing the poly(4‐vinylacetophenone) with benzaldehyde, these, too, show to varying degrees the property of becoming insoluble when exposed to light. This sensitivity to light is generally higher where the aldehyde used contains electrondonating substituent groups in the para‐position. This, in turn, is also related to the ability of such products to absorb a larger proportion of the longer wavelength portion of the emitted light.