Thermal ageing and accelerated weathering of HMSPP: structural and morphological studies
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Macromolecular Symposia
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This work focuses of the influence of weathering factors UV radiation,
humidity, and temperature on the structure and morphology poly(propylene) (PP)
with high melt strength (HMSPP), also called poly(propylene) modified by irradiation.
The HMSPP was prepared from isotactic poly(propylene) (iPP) in presence of
acetylene at 110 kPa pressure and irradiated with g of 60Co at doses of 5, 12.5
and 20 kGy. It has been observed that HMSPP deteriorates in the weathering and
thermal resistance, and the long-term stability of HMSPP, beyond substantial color
changes. The aged samples were characterized by infrared spectroscopy (FTIR),
optical microscopy (OM) and differential scanning calorimetry (DSC). The optical
microscopy shows different mechanisms on thermal and artificial weathering
ageing. The ageing result under elevated temperature in HMSPPs exposed surfaces
follows the order: HMSPP 20>12.5>5 kGy>iPP. The intense crack formation in
surface exposed justifies thermooxidative degradation.
Como referenciar
OLIANI, WASHINGTON L.; KOMATSU, LUIZ G.H.; LUGAO, ADEMAR B.; PARRA, DUCLERC F. Thermal ageing and accelerated weathering of HMSPP: structural and morphological studies. Macromolecular Symposia, v. 367, n. 1, p. 18-23, 2016. DOI: 10.1002/masy.201500135. Disponível em: http://repositorio.ipen.br/handle/123456789/27148. 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.