Crystallizability of SKI Vulcanizates by Adiabatic Stretching

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Abstract
Lithium isoprene rubber (SKI) which is very similar to natural rubber (NK) in structure and properties has been synthesized at the S. V. Lebedev VNIISK. During the development of the method of preparation and the investigation of the properties of SKI the necessity of studying the crystallizability of different samples of this new type of rubber became apparent. With this object in view we studied the conversion of work into heat during the adiabatic deformation of rubbers. It was shown that the conditions of preparation and of vulcanization determine whether SKI rubbers will crystallize on stretching or remain amorphous. This paper presents some of our data on the crystallizability of SKI rubber.

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