Thermal aging of a polyamide 66—experimental analysis and modeling

The present paper presents an analysis of the thermal aging process a polyamide 66 at two different temperatures: −6 °C and 60 °C, throughout time span 9000 h. proposes unified expression to estimate mechanical behavior in tensile tests stages. goal is algebraic equation able describe stress–strain curves that would be obtained using ASTM D638-14 standard for wide range times, without actual necessity performing all tests. It shown with minimum three performed stages, it possible obtain reasonable approximation curve this time.