Investigation of the influence of natural weathering factors on the properties of polyamide thermoplastic materials
Raduloviæ Jovan
Resistance of injection pressurized specimens of polyamide 66 with 20% glass fibres and polyamide 12 to natural weathering was investigated. The process of natural outdoor weathering, in two climatically different areas was fol-lowed by determining the physical, mechanical and thermal properties of polyamide 66 before and during eight and a half years of exposure and of polyamide 12 before and during three years of exposure. Main factors of natural weath-ering in the open and the expected material degradation mechanism were described.
Key words: thermoplastic materials, polyamide 66 with glass fibres, polyamide 12, natural weathering, influence of atmospheric conditions.