6533b7d6fe1ef96bd126680b

RESEARCH PRODUCT

Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling

Serena CoiaiFrancesca Cicogna* Chengcheng Yang 1Veronika Tempesti 1Sabrina Carola Carroccio 23Giuliana Gorrasi 4Raniero Mendichi 5Nadka Tz. Dintcheva 6Elisa Passaglia

subject

EthylenePolymers and Plastics02 engineering and technology010402 general chemistry01 natural sciencesPeroxideArticlelcsh:QD241-441chemistry.chemical_compoundlcsh:Organic chemistrynitroxide radical couplingPolymer chemistryCopolymerMoietyantioxidant covalent immobilizationchemistry.chemical_classificationOlefin fiberhindered phenol moietyChemistry (all)General ChemistryPolymer021001 nanoscience & nanotechnologyGrafting0104 chemical scienceschemistryCovalent bondantioxidant covalent immobilization; nitroxide radical coupling; hindered phenol moiety; HAS-NOR antioxidant0210 nano-technologyHAS-NOR antioxidant

description

The 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.

yearjournalcountryeditionlanguage
2017-12-01Polymers
https://doi.org/10.3390/polym9120670