Mechanical Properties of Nylon 66 Material under Thermal Air Aging
The work aims to investigate the mechanical properties of nylon 66 resin under thermal air aging.An experiment was conducted to nylon 66 resin bya thermal air aging method at 110℃ for 1000 hours.The surface the sample before and after aging was observed,along with tests for tensile strength,notched impact strength of a cantilever beam,and notched impact strength of a simply supported beam.Thus,the changes in mechanical properties of nylon 66 resin under the specified thermal air aging conditions were determined.The color of the aged sample changed from milky white to amber yellow,with the surface remaining intact,showing no cracking or powdering.The tensile strength of the aged sample increased slightly,with an average strength retention rate of 105.1％.The notched impact strength of the cantilever beam of theaged sample experienced a slight decrease,with an average strength retention rate of 94.7％.Similarly,the notched impact strength of the simply supported beam of the aged sample also presented a slight decline,with an average strength retention rate of 93.9％.In conclusion,nylon 66 resin undergoes aging under the specified thermal air conditions,but this does not lead to a significant decline in the overall mechanical properties of the material in the short term.
polymernylon 66polyamidethermal air agingtensile strengthimpact strength
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