Poly phenyl isopropenyl ketone

Poly(phenyl isopropenyl ketone-co-M M A) [P(PhlPK-MMA)] 10 Copolymer with MMA(28 72) 71... [Pg.138]

Poly(phenyl isopropenyl ketone-co-acrylic acid)... [Pg.107]

Photodegradation of poly(phenyl isopropenyl ketone) (or poly(2-methyl-l-phenyl-2-propen-l-one) (3.21) occurs by the following mechanism, which includes [1541-1543] ... [Pg.118]

VIII POLY (STYRENE-CO - PHENYL ISOPROPENYL KETONE) (PS-PIPK)... [Pg.167]

Poly(styrene-co-phenyl isopropenyl ketone) (PS-PIPK) VIII... [Pg.113]

UV and y-radiation of poly(methyl isopropenyl ketone) produced random chain scission at 23 °C. The presence of air increases unexpectedly the main chain scission of the polymer under y-radiation [377]. In a series of publications [378] the radiolysis and photolysis of poly(phenyl vinyl ketone), poly(vinyl benzophenone), and poly(/-butyl vinyl ketone) [357] were described. The authors stated that photodegradation of poly (phenyl vinyl ketone) occurred by the abstraction of a hydrogen in the y-position to a carbonyl group, followed by chain scission by a Norrish type II photoelimination mechanism. [Pg.647]

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]

Poly(methyl methacrylate-co-phenyl isopropenyl ketone) 1194, 1540, 1541,... [Pg.137]

Poly(styrene-p-ring substituted (Cl, OH, NH2, NO2) phenyl isopropenyl ketone)... [Pg.187]

A macromolecular chain presents a unique reaction situation in which, in certain cases, groups which are potential reactants at elevated temperature are located in close proximity. Thus intramolecular cyclization may occur, which may or may not involve elimination of small molecules. For example, vinyl ketone polymers such as poly(methyl vinyl ketone) (PMVK), poly(methyl isopropenyl ketone) (PMIK) and poly(phenyl vinyl ketone) undergo random cyclization of adjacent monomer units with release of water. The reaction for PMVK is illustrated in Scheme 4. [Pg.1221]

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