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Updated: Dec 20, 2025

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Published on: April 27, 2019
Durability of LDPE/UHMWPE Composites under Accelerated Degradation
Traian Zaharescu1,2, Maria Râpă3, Ignazio Blanco4
1National Institute for Electrical Engineering (INCDIE, ICPE - CA), Radiochemistry Center, 030138 Bucharest, Romania.
Abstract:
This study presents a detailed analysis of thermal and radiation resistances of low density polyethylene (LDPE)/ultra-high molecular weight polyethylene (UHMWPE) blends containing hydroxyapatite as functional filler and rosemary acting as antioxidant against oxidative degradation. Three main procedures, chemiluminescence (CL), Fourier transform infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC), were applied for the determination of the degree of degradation when these materials are subjected to heat and radiation action. The crystallinity was also assessed for the characterization of diffusion peculiarities. The contributions of the mixing components are discussed based on their oxidation strength. The activation energies required for the oxidative degradation of the studied formulations were calculated.
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