THE KINETICS OF SOLUTION OF POLY(METHYL-5 -VINYL TETRAZOLE)S IN NITROMETHANE

The kinetics of formation of solutions of poly(methyl-5-vinyl tetrazol e)s is nitromethane is investigated. It is found that the characterist ics of solutions are affected by the position of the methyl group in t he tetrazole heterocycle. The concentration dependence of the diffusio n coefficients of homo- and copolymers of methylated vinyltetrazoles i s measured. The diffusion coffecients increase directly proportionally to the content of 2-methyl-5-vinyl tetrazole in copolymer; these coef ficients fit a unique dependence when they are represented as a functi on of the difference between experimental temperature and the glass tr ansition temperature. The Flory-Huggins parameters of interaction are evaluated for the polymers studied. Formation of a stable intermolecul ar complex in the system of poly(1-methyl-5-vinyl tetrazole)-nitrometh ane is confirmed with the data of anisothermic desorption and UV spect roscopy. It is supposed that different behavior of poly(1-methyl-5-vin yl tetrazole) and poly(2-methyl-5-vinyl tetrazole) in nitromethane sol utions is due to different distribution of electron density in tetrazo le cycle, depending on the position of methyl substituent.