Cinnamic acid esters of poly(vinyl alcohol) and of cellulose are insolubilized by ultraviolet radiation. This response may be increased by the inclusion of simple organic compounds such as Crystal Violet carbinol and Michler's ketone. A method of measuring this response (in terms of a sensitivity value, S) based upon photographic sensitometry has been devised. Preliminary study indicates that an increase in S is accompanied by an increase in response to the longer wavelengths of light.

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When polyvinyl jS-cyanoethyl ether is hydrolyzed with sodium hydroxide in a water-methyl cellosolve system, a decyanoethylation to polyvinyl alcohol results rather than hydrolysis of the nitrile group to yield a polymeric acid. This decyanoethylation has been studied through isolation and analysis of the polymer. First-order reaction kinetics are followed. The rate constant is directly proportional to the concentration of catalyst and independent of the concentration of polymer.The Arrhenius activation energy, AflT, was found to be 30,600 cal. per combined monomer mole.