UV stability of HMS-PP (High Melt Strength Polypropylene) obtained by radiation process
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2008
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INTERNATIONAL SYMPOSIUM ON IONIZING RADIATION AND POLYMERS, 8th
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Resumo
HMS-PP in grains was synthesized by the gamma irradiation of PP under a crosslinking
atmosphere of acetylene, followed by thermal treatment for radical recombination and
thermal treatment for annihilation of the remaining radicals.
The UV stability of the material was evaluated in reference to grains. Accelerated
weathering test of HMS-PP samples were performed in artificial ultraviolet light and
condensation chamber apparatus Comexim (C-UV type) in aging conditions of exposure
for 120 hours and 240 hours. The results were compared to the deterioration caused by
sunlight and dew under natural exposition.
This work investigated changes in mechanical proprieties (elongation and rupture strength)
behavior, Infrared Spectroscopy (FTIR), Optical Microscopy (MO), Scanning Electronic
Microscopy (SEM) and Rheological properties of HMS-PP.
The HMS-PP is more fragile than PP and undergoes predominately chain scission in
aggressive environment degradation conditions.
Como referenciar
OLIANI, W.L.; PARRA, D.F.; LUGAO, A.B. UV stability of HMS-PP (High Melt Strength Polypropylene) obtained by radiation process. In: INTERNATIONAL SYMPOSIUM ON IONIZING RADIATION AND POLYMERS, 8th, 12-17 de outubro, 2008, Angra dos Reis, RJ. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/15963. Acesso em: 31 Dec 2025.
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.