Stability Improvement of Irradiated Polymer Composites by Inorganic Compounds-A Pertinent Solution with Respect to Phenolic Antioxidants

Autor(es)

Zaharescu, Traian ; Lugao, Ademar B.

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF COMPOSITES SCIENCE; v. 9, n. 1, p. 21-pg., 2025-01-01.

Resumo

The long-term usage of polymer products necessitates addressing the appropriate preservation of their low oxidation state that extends the warranty period. The addition of pertinent stabilization components into the composite formulations (synthesis and natural antioxidants, pristine and doped oxides, clays or couples of them) produces an improvement in the kinetic parameters characterizing the accelerated degradation that occurs during high-energy exposures. The competition between the material ageing and the mitigation of oxidation is controlled by the protection efficiency. In this paper, the main advantages of inorganic structures in comparison to classical organic antioxidants are emphasized. A significant improvement in stability, simultaneously associated with the enhancing of functional characteristics, the lack of migration, low cost and easy accessibility, make the reevaluation of certain fillers as stabilizers appropriate. The correlation between the functional properties and the filler nature in polymer materials may be reconsidered for the assessment of the participation capability of inorganic structures in the inhibition of oxidation by the inactivation of free radicals. The lifetimes of degradation intermediates extended by the activities of inorganic compounds are increased by means of electrical interactions involving the unpaired electrons of molecular fragments. These physical contributions are reflected in chemical stability. An essential feature for the presented inorganic options is a strong impact on the recycling technologies of polymers by radiation processing. Plastic products, including all categories of macromolecular materials, can gain an increased durability through the inorganic alternative of protection. (AU)

• Processo FAPESP: 24/11337-0 - Desenvolvimento e caracterização de compósitos poliméricos como barreira à radiação ionizante.
• Beneficiário: Ademar Benévolo Lugão
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional