Thermal stabilization activities of metal oxide γ-Irradiated Styrene–Isoprene–Styrene nanocomposites
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Journal of Composites Science
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This study provides insights into the stabilization effects of certain oxides (CeO2,
Cr2O3, Cd2O3, In2O3, MnO2, MgO, Nd2O3, and Pr2O3) in styrene–isoprene–styrene triblock
copolymers with respect to neat materials. This study was performed via chemiluminescence
(CL), which allowed for the determination of the main parameters characterizing
the interphase coexistence: the oxidation induction times, oxidation rates, and onset oxidation
temperatures. The improvement in the thermal performances of the pristine and
γ-ray-processed samples at a moderate dose was highlighted differently due to the electronic
interactions on the particle surface. While the non-isothermal CL measurements
pointed to a weaker evolution of oxidation in the studied composites at a higher temperature
range over 160 ◦C, the isothermal CL determinations revealed a delayed start of
oxidation, slower oxidation rates, and greater activation energies in the nanocomposite
aging patterns. The different individual behaviors of the investigated formulations were
ascribed to the dissimilar electronic interactions between the particles and the surrounding
matrix, where the oxidation initiators were formed by the molecular fragmentation of the
polymer macromolecules. The kinetic features illustrate the influence of the peculiarities
due to the electronic interactions. The higher resistance shown by the irradiated samples
compared with the non-processed compositions demonstrates the stabilization efficiency
of the fillers studied.
Como referenciar
ZAHARESCU, TRAIAN; LUGAO, ADEMAR B.; MANGALAGIU, VIOLETA; MIREA, RADU. Thermal stabilization activities of metal oxide γ-Irradiated Styrene–Isoprene–Styrene nanocomposites. Journal of Composites Science, v. 9, n. 4, p. 1-14, 2025. DOI: 10.3390/jcs9040192. Disponível em: https://repositorio.ipen.br/handle/123456789/49326. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.