Abstract
The transport characteristics and the subsequent reduction in mechanical strength of natural rubber vulcanizates have been investigated using chlorinated hydrocarbons as probe molecules. The transport process has been examined by a sorption-desorption-resorption-redesorption technique. The mode of transport was found to change from the anomalous nature to the regular Fickian trend after a sorption-desorption cycle. The modulus of rubber samples decreased considerably under swollen conditions. The marching trend of stress-strain curves vanished after solvent saturation which has been explained on the basis of the absence of strain-induced crystallisation in swollen specimens. The modulus of solvent-saturated samples was found to be a function of rubber-solvent interaction which has been explained in terms of the differences in the contribution of physical entanglements to the total crosslink density.
Published Version
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