SAXS INVESTIGATIONS OF THE INFLUENCE OF THE LENGTH OF METHYLENE CHAINON SUPERMOLECULAR STRUCTURE OF POLY(ALKYLENE PHOSPHATES)

The influence of the number of CH2 groups and the evennes of this numb er on the lamellar arrangement of macromolecules of poly(alkylene phos phates) PPhn were investigated by SAXS method. The results indicate th at deviations from the ideal lamellar model for the polyphosphates wit h asymmetric mers (n-odd number) art generally larger and qualitativel y different as compared with that for the polyphosphates with symmetri c mers (n- even number). The heterogeneity of phases were measured by the ratio of the mean square electron density fluctuations calculated from the SAXS curves before and after background subtraction. It was f ound that the heterogeneity of the PPh8 polyphosphate is smallest. Bes ides, a linear relationship between the weight average long period L(w ) and the molecular mass of the PPhn polyphosphates was confirmed.