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S. K.  Rath, Sudarshan, K., Bhavsar, R. S., Kharul, U. K., Pujari, P. K., Patri, M., and Khakhar, D. V., ?Characterizing the nanoclay induced constrained amorphous region in model segmented polyurethane-urea/clay nanocomposites and its implications on gas barrier properties?, Physical Chemistry Chemical Physics, vol. 18, no. 3, pp. 1487-1499, 2016.