Journal Article Effects of chain transfer agent on the electron beam-induced graft polymerization of glycidyl methacrylate in emulsion phase

ジョーダン, フェルナ ンデス マドリッド  ,  Lucille, V. Abad(Philippine Nuclear Research Institute)  ,  山延, 健 (群馬大学)  ,  瀬古, 典明

295 ( 6 )  , pp.1007 - 1016 , 2017-06 , Springer
The graft polymerization of glycidyl methacrylatefrom irradiated polyethylene/polypropylene (PE/PP) in thepresence of the chain transfer agent 4-cyano-4-((phenylcarbonothioyl)thio) pentanoic acid (CPPA) wasstudied at 40 °C using pre-irradiation grafting technique.Free radical active sites on polyethylene/polypropylene wereformed by electron beam irradiation in nitrogen atmosphereand dry ice temperature. Compared to the conventionalgrafting method, addition of the chain transfer agent resultedin lower amount of grafted poly(glycidyl methacrylate)(PGMA) on the PE/PP trunk polymer. The calculated degreeof grafting increased with increment in absorbed dose andreaction time but decreased with increasing glycidyl methacrylateconcentration, at fixed monomer to CPPA ratio, andamount of CPPA. An apparent first-order dependence of conversionon monomer concentration was observed. The freepoly(glycidyl methacrylate) that was formed in the polymerizationmixture during grafting in the presence of CPPA hadMn which increased with reaction time and polydispersity index(PDI) values less than 2. NMR analysis of the PGMAhomopolymer indicates the presence of dithiobenzoate groupfrom CPPA at one end of the polymer chain. The pristine andgrafted trunk polymers were characterized with FTIR, TGA,and SEM-EDX.

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