Abstract
The effect of deep freezing on the fracture behaviors of solid polymers has been investigated by means of the drop-weight impact compression-crushing apparatus.
In the range of low temperatures at which solid polymers are fractured, the energy input to material is independent of temperature, and increases with increasing drop-height. The strain energy necessary for deformation before the initiation of impact compression-crushing is smaller than that before the initiation of static compression-crushing. The specific surface increase ΔS and the crushing extension index CEI increase with decreasing temperature. The crushing extension index of the impact compression-crushing is the same as that of the static compression-crushing.
In the range of higher temperatures at which solid polymers are not fractured, the energy input to material and the permanent strain decrease with decreasing temperature. The fracture-nonfracture transition temperature moves from a low temperature level to a higher temperature level with increasing drop-height.
