Polycarboxylic acids and their analogues

However, the keto-enol tautomerism may also occurs [Pg.127]

Polyene structures such as diene, triene and tetraene disappear under UV irradiation [1416]. [Pg.127]

Ozone accelerates UV degradation of poly(vinyl alcohol) in water solution [1041]. [Pg.127]

Photodegradation of poly(acrylic acid [449, 1952] occurs by mechanisms similar to those described for poly(methacrylic acid) (cf section 3.4.2). There are several papers devoted to the photodegradation of polycarboxylic acid esters such as poly(vinyl acetate) [335-337, 519, 749, 750, 1482, 2147, 2173] (cf section 3.4.4), poly(vinyl propionate [335-337], poly(vinyl butyrate) [1480], and copolymers such as poly(acrylic acid-co-phenyl isopropenyl ketone) [1465], poly(vinyl acetate-co-ethylene [335-337,2003], poly(vinyl acetate-coethylene) blends with poly(vinyl chloride [2005] and poly(vinyl acetate-cophenyl vinyl ketone [1208, 1209]. [Pg.127]

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