Copolymerization of pentachlorophenyl acrylate with vinyl acetate and ethyl acrylate. Polymer-bound fungicides

✍ Scribed by Charles U. Pittman Jr.; G. Allan Stahl

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 528 KB
• Volume: 26
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1981.070260726

✦ Synopsis

Copolymers of pentachlorophenyl acrylate ( M I ) with both vinyl acetate and ethyl acrylate were prepared (in benzene at 6OoC initiated by t-butyl peroxypivalate) at a variety of MI/MZ ratios. The reactivity ratios for the vinyl acetate (Mz) copolymerizations were rl = 1.44 and rz = 0.039, while for ethyl acrylate copolymerizations rl = 0.21 and r2 = 0.88. The glass transition temperatures were obtained as a function of the Ml/M2 ratio. The values of T, for the copolymers fell between those of poly(pentachloropheny1 acrylate) and either poly(viny1 acetate) or poly(ethy1 acrylate). A series of bulk copolymers with low pentachlorophenyl acrylate content were studied as biocidal coatings using accelerated growth agar dish tests inoculated with Aspergillus sp., Pseudonlonas sp., Alternaria sp., and Aureobasidium pullulans. The copolymers retarded or prevented growth but did not give a zone of inhibition around the coatings. Pentachlorophenol, when added to coating polymers, did exhibit a zone of inhibition due to migration of this biocide into the agar medium.