The physical aging behavior of Nylon 66 and polyethylene terephtalate (PET) films as a function of aging temperature, magnitude of applied stress and aging time has been investigated. Creep tests were performed for samples quenched from a stabilization temperature of 160°C (Nylon 66) or 130°C (PET) to aging temperatures between 25°C and 130°C, for aging times ranging from 0.5 to 166 hours, and at stresses levels from 8 MPa to 40 MPa. For Nylon 66 the creep compliance curves at different aging times were able to be superimposed in the temperature range of 25 - 60°C. For PET the creep compliance curves at different aging times were able to be superimposed only at 60°C. The double logarithmic shift rate was calculated and its dependence on aging temperature and applied stress was determined.
|Number of pages||14|
|State||Published - 1995|
|Event||Proceedings of the 53rd Annual Technical Conference. Part 1 (of 3) - Boston, MA, USA|
Duration: May 7 1995 → Oct 11 1995
|Conference||Proceedings of the 53rd Annual Technical Conference. Part 1 (of 3)|
|City||Boston, MA, USA|
|Period||05/7/95 → 10/11/95|