The paper considers the peculiarities of structure forming in composite materials on the basis of polytetrafluoroethylene (PTFE) containing metals or polyimide while explosive processing of powder compositions by the ring shock front. The stepwise change of the structure in the center of pressing, accompanied by occurrence of nanodimensional phases, change of fine structure and increase of microhardness is determined. It is achieved under a certain combination of the explosive's parameters and powder composition's porosity.
Explosive pressing is presented as a promising new method for processing industrial fluoroplastic waste. Optimum loading and sintering parameters are determined providing preparation of high-density compacts of fluoroplastic-4 and F4K20 chips. It is shown that high-speed loading causes polymer waste grinding forming strengthened zones over particle boundaries, and this provides good secondary material mechanical properties and makes it possible to exclude fine grinding obligatory for traditional technology.
Researches of morphology, molecular structure and thermal properties of polytetrafl uorethylen (PTFE) after explosive processing (EP) were conducted. It has been revealed that explosive processing leads to essential changes of industrial PTFE characteristics. It allows the creation of various morphological structures, such as compacting (continuous) fl uoropolymer products. The received result shows the possibility of formation metal-fl uoroplastic chemical compounds during obtaining metallopolymeric composite by EP.
