Polymères photoréticulables à unités cinnamiques, 2. Synthèse par modification chimique et par polycondensation

Abstract

Polymers containing cinnamic acid units were obtained by chemical modification of poly(viny1 alcohol) by cinnamic acid derivatives with a carbon-carbon double bond in para position. The reactivity of the acid chloride is lowered by the inductive effect of the double bond. Polycondensation of these derivatives, when difunctional, leads to low-molecular-weight polyamides and polyesters with good yields. The introduction of acrylic or methacrylic groups on photosensitizers has also been studied, leading to monomers which can be polymerized by a radical process, or copolymerized with the previous monomers, the polymer bearing then the photosensitizer and the cinnamic double bond on the same chain.