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p-Phenylenediacrylic acid (p-PDA) der ivatiyes is one of the attracti.ye comptinds as photoreactive materials, We have studied extensively photopolymerization of p-PDA diesters in the crystalline state[1]. Following this study, we have prepared a series of p-PDA monoesters and studied their photoreaction in various states such as in crystals and Langmuir-Blodgett (LB) films[2,3]. Recently we have synthesized new photosensitive polyvinyl alcohol)s having p-PDA groups as the side chain[4]. They showed high photosensitivity, which may be due to the polymer effect. In this report, we deal with PVA bearing long-chain alkyl esters of p-PDA, expecting the preparation of photosensitive polymer LB films, which may be useful in various industry fields, p-PDA monon-decyl ester (p-PDAmC10) was usedfor esterification of PVA. PVA with p-PDAmC10 was prepared from fully saponified PVA of P=1700 and p-PDAmC10 using 1-' chloro-2,4,6-trinitrobenzene as the condensing reagents. The degree of esterification estimated by measuring UV spectrum of this polymer (p-PDAmC10-PVA), was 30 mol/%, For the LB film preparation, a commercially available film balance (Lauda-MGW) was used as a _ CH2 1QCCH=CH H=CHCO-CH nn trough, p-PDAmC I II 10 0 Q CH

Preparation and photoreaction of langmuir-blodgett film made from poly(vinyl alcohol) having p-phenylenediacrylic acid ester.