MOLECULAR-STRUCTURE HETEROGENEITY AND DIS TRIBUTION OF DIBUTYL PHTHALATE IN CELLULOSE NITRATES AS EVIDENCED BY IR SPECTROSCOPY

IR data showed that distribution of a plasticizing agent, dibytyl phth alate, in a cellulose nitrate matrix was controlled by heterogeneity o f its molecular structure, Spectral characteristics such as width of b ands of stretching oscillations nu(NO2) and optical densities of a com plex band of stretching oscillations nu(OH) of cellulose nitrate were measured. To estimate the heterogeneity of molecular structure and the inhomogeneous distribution of a plasticizing agent in cellulose nitra tes, relative contents of hydrogen bonds of various types were evaluat ed The distribution of a plasticizing agent in cellulose nitrate was s hown to be controlled by nitration conditions, which were responsible for the heterogeneity of the molecular structure of the polymer.