Polychronous kinetics

Thus in each concrete case quasi-homogeneous models (in particular, models of the polychronous kinetics) need to be confirmed by special experiments eliminating the effects of autowave processes on the reaction dynamics. 

This structural mosaic of the polymer results in the so-called polychronous kinetics of physical and chemical processes in the polymer. The polychronous kinetics is manifested as the stepwise process in heating the polymer. When free radicals are generated in the concentration [R-]o in the polymer, for example, polystyrene, at the low temperature Tq and then the sample is heated to the temperature Tj, some radicals decay due to diffusion and recombination, and the new concentration [R]i is established rather rapidly (for 10 -10 s) and then at T] = const remains virtually... 

The polychronous kinetics reflect the deep interrelation between the reaction kinetics in the polymer and molecular mobility of the polymer segments and the nonuniformity of the polymer as a medium for the slow relaxation of physical processes in the polymer. 

The above described statements are confirmed by theory. The authors of works [207,208] established the concept of constant velocity spectrum of elementary chemical reactions, which is due to the different levels of reciprocal arrangement of reactive molecules. This concept is used for the description of chemical processes in liquid condensed systems within the polychronic kinetics model [209,210]. The level of structural organization is characterized by the orientation order parameter a, similar in its physical sense to orientation interaction coefficient 8, which was used by the authors of works referred to in Part 2.6.4. Parameter a can vary from 0 (isotropic system) to 1 (maximum anisotropy, the molecules are parallel). 

The formal kinetics of such polychronous processes was developed. It is based on the fact that the particles are distributed over microreactors (ensembles) in each of which the reaction occurs with the intrinsic activation energy. Formally this looks like the particle distribution over activation energies... 

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