Physicochemical aspects of plastic flow

In the present paper are given the results of studying the processes of polymerization, polycondensation and polyaddition in solids. The processes of polymerization under high pressure and shear deformation have been shown to proceed with much larger rates than the similar processes in a liquid phase. It has been found that in a solid state the reactions do not proceed in the directions to be expected knowing the laws of the classical organic chemistry. While realizing shear deformation in solids at high pressure we have discovered superhigh molecular mobility of particles. Uniaxial deformation of polymers and polymer mixtures leads to the formation of oriented fibers while in multi-stressed state polymer is converted into powder. The results obtained during the formation of powders by elastic-deformation method have been discussed.