Effects of Heat Aging on the Properties of Rigid Medical Packaging Materials

摘要

Retention of physical, thermal and optical properties at an elevated temperature of 50°C was monitored in a heat aging study of two materials, following conditions of ASTM D-3045. XT~R polymer acrylic-based multipolymer compounds were stable through 24 weeks of aging, with only minor optical changes. In contrast, EASTAR 6763 copolyester suffered significant property changes, notably embrittlement and higher glass transition enthalpy. Ethylene Oxide (EtO) sterilization further widened the performance gap. Retained strength of rigid medical packages is important for adequate protection through the rigors of storage and transportation.