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Study on Effect of Variation of Diisocyanate and NCO/OH Molar Ratio on Thermal Property and Crystallinity of Interpenetrating Polymer Networks Derived From Biomass

N. Mohanty, B. N. Guru, P. G. R. Achary and N. C. Pal

Polymers derived from biomass are now a matter of the utmost importance from both commercial and academic points of view. Using annually renewable biomass, agricultural waste and a low cost natural oil, the production of new cross-linked polymers can have both economic and environmental benefits. The production, modification, property enhancement and new applications of these materials are an important concern. Interpenetrating polymer networks were synthesized from glycerol modified linseed oil, an aliphatic or aromatic diisocyanate and phosphorylated cardanol. Characterizations of these polymers were performed by spectral and thermal analysis techniques. The kinetic parameters such as activation energies and order of reactions were estimated by using Freeman-Anderson’s method. Crystallinity of these polymers was determined by XRD study. The choice of diisocyanate and the variation of NCO/OH molar ratio of polyurethanes on the properties of such polymers are the scope of the present investigation.