Phase separation in a system based on cross-linked rubber and low-molecular-mass crystallizable solvent

Various compositions of cross-linked NR containing different amounts of a l inear crystallizable hydrocarbon were studied. At a given content of hydroc arbon in the composition, the corresponding cooling thermograms show two pe aks associated with the crystallization of the solvent. Different rates of solvent microsyneresis and crystallization, as well as the dependence of th ese rates on the solvent concentration in polymer bulk, lead to the appeara nce of one or two peaks of solvent crystallization in the corresponding coo ling thermograms.