IR-SPECTRA, OPTICAL-CONSTANTS, POLARIZABI LITY, AND STRUCTURE OF EPOXIDIAN OLIGOMERS IN SOLUTION

Frustrated multiple internal reflectance (FMIR) spectra of epoxidian o ligomers (degree of polymerization, 1.5-6) in chloroform solutions (co ncentration, 5-75 wt%) were measured in the IR range (950-1650 cm(-1)) using KRS-5 crystal plates. The spectra of optical constants n(nu) an d alpha(nu), the real alpha(nu) and imaginary alpha'(nu) parts of the average complex polarizability <(alpha)over cap>(nu), and the orientat ional parameters of macromolecules were calculated using the Fresnel a nd Kramers-Kronig procedures. The concentration dependence of the seco nd-order orientational parameters of oligomers in solution at the KRS- 5 surface, calculated from the spectra of polarizability alpha(nu), ag ree well with the results of viscosity measurements and with the stati stical parameters of light scattering (correlation radii of the polari zability and orientation fluctuations in the bulk solution, determined by the Rayleigh scattering technique).