This study explores how a gaseous pollutant affects the long-term mechanical properties of nylon-6 fibres. It will be shown that the high-strength polymeric fibres degrade rather quickly when held under stress in the presence of NOx, a component of industrial pollution. Studies have been conducted on fibres, both bare and embedded in an epoxy matrix, that clearly demonstrate a synergistic effect of applied stress and NOx gas. It is observed that the combination of stresses of 50% of the ultimate fibre strength and a NOx concentration of 0.05% by volume will result in sample failure in less than half a day. This concentration is representative of NOx emitted in the exhaust of older-model cars. If these high-strength plastics are to be used in industrial or automotive applications where such pollutants would be present, this type of degradation should be taken into consideration for proper design.
Посилання на статтю:
Mechanical properties of polymeric fibres exposed to stress in a NOx environment / L. V. Smith and K. L. DeVries // Polymer. – 1993. – Vol 34. – P. 546-550.