engleski

Polymerization of N(p-phenoxy-phenyl)acrylamide and copolymers with styrene

Copolymerization of N(p-phenoxy-phenyl)acrylamide (PhOPhAA) with styrene (St) in butanone at 700C under different monomer-to-monomer ratios in the feeed using AIBN as free-radical initiator is described. The total monomer concentration was 1 mol L-1. The copolymer composition was evaluated by nitrogen content in copolymers. The reactivity ratios determined by Kelen-Tüdös method indicate the random arrangement of monomers in copolymer chain with an azeotropic point at equimolar ratio of comonomers. Mean sequence length distribution in copolymers was estimated from r1 (PhOPhAA) = 0.53 and r2 (St) = 0.48. Activation energy determined by Arrhenius method is 118 kJ mol-1. Copolymers are thermally stable up to temperature of 4000C under TGA conditions. Tg's and higher transition temperatures increase by increasing the content of PhOPhAA in copolymers. The same was also found for molecular weights of copolymers.

N(p-Phenoxy-phenyl)acrylamide; Poly[N(p-phenoxy-phenyl)acrylamide]; Poly[N(p-phenoxy-phenyl)acrylamide-co-styrene]; Mechanism of copolymerization; Reactivity ratios; Mean sequence length; Thermal properties

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