Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling
AbstractThe covalent immobilization of hindered phenol groups, with potential antioxidant activity, onto an ethylene/α-olefin (EOC) copolymer was carried out by the nitroxide radical coupling (NRC) reaction performed in the melt with a peroxide and the 3,5-di-tert-butyl-4-hydroxybenzoyl-2,2,6,6-tetramethylpiperidine-1-oxyl radical (BHB-T). Functionalized EOC (EOC-g-(BHB-T)) was exposed to photo- and thermo-oxidation. By comparison with some model compounds bearing the (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) moiety or the hindered phenol unit, it was observed that the grafted BHB-T could effectively help the stabilization of the polymer matrix both under photo- and thermo-oxidation. In addition, the immobilization of BHB-T can effectively increase the service life of the functionalized polymers when polymer films were put in contact with ethanol solution thus simulating a possible application of the modified polymer. View Full-Text
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Coiai, S.; Cicogna, F.; Yang, C.; Tempesti, V.; Carroccio, S.C.; Gorrasi, G.; Mendichi, R.; Dintcheva, N.T.; Passaglia, E. Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling. Polymers 2017, 9, 670.
Coiai S, Cicogna F, Yang C, Tempesti V, Carroccio SC, Gorrasi G, Mendichi R, Dintcheva NT, Passaglia E. Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling. Polymers. 2017; 9(12):670.Chicago/Turabian Style
Coiai, Serena; Cicogna, Francesca; Yang, Chengcheng; Tempesti, Veronika; Carroccio, Sabrina C.; Gorrasi, Giuliana; Mendichi, Raniero; Dintcheva, Nadka T.; Passaglia, Elisa. 2017. "Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling." Polymers 9, no. 12: 670.
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