Browsing by Author "RAO, KVC"
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Item ACCELERATED DEGRADATION OF POLY(ESTER URETHANE) BY ADENOSINE-TRIPHOSPHATE(JOURNAL OF APPLIED POLYMER SCIENCE, 1991) SREENIVASAN, K; JAYABALAN, M; RAO, KVCItem STUDIES ON THE RADIATION-INDUCED GRAFT-COPOLYMERIZATION OF MIXTURES OF NORMAL-BUTYL ACRYLATE AND 2-HYDROXYETHYL METHACRYLATE ON POLYURETHANE .1. SYNTHESIS AND CHARACTERIZATION(JOURNAL OF APPLIED POLYMER SCIENCE, 1992) SREENIVASAN, K; RAO, KVCModification of polyurethane, by grafting two types of monomers, a hydrophilic and hydrophobic, with an aim to enrich the surface with both hydrophobic and hydrophilic moieties, is attempted. Grafting of 2-hydroxyethyl methacrylate and n-butyl acrylate from a mixture of these two onto polyurethane by gamma-irradiation and subsequent characterization of the graft copolymer by infrared spectroscopic method, mechanical characterization, contact angle, and scanning electron microscopy is detailed.Item STUDIES ON THE SORPTION OF LIPIDS IN SEGMENTED POLYURETHANES .2. EFFECT OF HARD-SEGMENT CONTENT(JOURNAL OF APPLIED POLYMER SCIENCE, 1992) SREENIVASAN, K; JAYABALAN, M; RAO, KVCDiffusion and absorption, of a few representative components found in blood, in segmented polyurethane are studied. The absorption of the components, confined to the soft segment, is found to be Fickian. Both diffusion coefficients and equilibrium absorption was found to decrease with % hard-segment content. An empirical equation has been proposed to visualize the absorption behavior with soft/hard-segment content.