Compatibility of Components and Relaxation Properties of Composites Based on Secondary Polypropylene and Modified Basalt Fibers

The compatibility of polypropylene with chemical hydrocarbon structures formed on the surface of basalt fibers is predicted using a nonstandard method of their processing. CCl₄ steaming is performed in a flow reactor to replace oxygen atoms with chlorine atoms, after which the chlorinated surface is treated in a stream of CH₄ to replace chlorine with hydrocarbon groups. The chemical structure of hydrocarbon groups most compatible with polypropylene is determined by calculations using the Cascade computer program. IR spectroscopy and microanalysis confirm the presence of groups and on the surface of basalt fibers, which are chemically bonded to silicon atoms. The resulting composites based on secondary polypropylene reinforced with processed basalt fibers show a significant increase in the relaxing stress and modulus at all observation times.