Ternary semi‐IPNs of nitrocellulose, poly(vinyl chloride‐co‐vinyl acetate), and polyurethanes have been synthesized and characterized by FT‐IR, SEM, and differential scanning calorimetry. Semi‐IPNs of nitrocellulose‐polyurethanes are found to be incompatible whereas the ternary system consisting of nitrocellulose‐poly(vinyl chloride‐co‐vinyl acetate) and polyurethanes is partially compatible. Hydrogen bonding interactions are discussed based on the FT‐IR analysis. The tensile strength and percent elongation are interpreted on the basis of the NCO/OH ratio and composition.
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Natchimuthu et al. (1992) studied this question.
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