The structure, rate and stability of autowaves during polymerization of Co metal-complexes with acryl amide

Abstract

Frontal polymerization of cobalt nitrate containing metal-complex monomers with acryl-amide, compared to the frontal polymerization of liquid monomers, has several peculiarities with intricate (three- and two-stepped) structure of heat polymerization waves. Also, density increase elevates monotonically the upper-limit temperature of heat waves, broadens the gradient of temperature profiles, as well as changes the rate of the front propagation non-monotonically. Presumably, the surface tension energy and wetting power of crystalline monomers play an important role in the dynamics of propagation of heat waves as it was shown by the specially designed experiments. Experimentally, three ranges of thermal regimes were determined: (i) the range where stationary (steady-state) heat waves exist; (ii) non-steady-state range; and (iii) the range where no wave regimes are possible to exist. In the form of spin and other non-linear structures, one-, two-, three- and multi-set regimes were ascertained in non-steady-state range.