Grafting of Hindered Phenol Groups onto Ethylene/α-Olefin Copolymer by Nitroxide Radical Coupling
Authors:
- Serena CoiaiSerena Coiai
- Francesca CicognaFrancesca Cicogna
- Chengcheng YangChengcheng Yang
- Veronika TempestiVeronika Tempesti
- Sabrina Carola CarroccioSabrina Carola Carroccio
- Giuliana GorrasiGiuliana Gorrasi
- Raniero MendichiRaniero Mendichi
- Nadka Tz. DintchevaNadka Tz. Dintcheva
- Elisa PassagliaElisa Passaglia
Open Access
Abstract
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.Keywords
Funding Information
- Ministero dell’Istruzione, dell’Università e della Ricerca (RBFR10DCS7)
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