Abstract
When an elastomeric material is deformed and subjected to temperatures above some characteristic value (the chemorheological temperature—near 100 °C for natural rubber), there are time and temperature dependent changes in its macromolecular structure. The macromolecular crosslinks undergo scission, recoiling and re-crosslinking. The process continues until the temperature decreases below the chemorheological temperature. The material now has modified properties (reduced stiffness) and permanent set on removal of the applied load.
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