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Formaldehyde polymers, 25. Copolymerization of 6,8‐dimethyl‐4‐oxo‐5‐chromanylmethyl acrylate with styrene, methyl methacrylate, and vinyl chloride

Akira Ninagawa, Yukio Tokunaga, Haruo Matsuda

Abstract

Abstract The free radical copolymerizations of 6,8‐dimethyl‐4‐oxo‐5‐chromanylmethyl acrylate (DCA) with styrene (St), methyl methacrylate (MMA), and vinyl chloride (VC) by the solution polymerization method were studied. For copolymerization of DCA(M1) with St(M2), the reactivity ratios were r1=0,32, r2=0,70; with MMA(M2) they were r1=0,43, r2=2,00; and with VC(M2) they were r1=4,00, r2=0,08. The Q and e values for DCA were 0,54 and 0,42, respectively. It was also shown that the chromanone skeleton acts as UV‐absorber, and inhibits photodegradation of the copolymers.

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Key concepts: Copolymer, Methyl methacrylate, Styrene, Polymer chemistry, Methyl acrylate, Vinyl chloride, Acrylate, Photodegradation