Ислом каримов номидаги тошкент давлат техника университети «фан ва тарақҚиёт» давлат унитар корхонаси

The object of the research work of study are polymer matrices - epoxy resins ED-16 and ED-20 (GOST 10587), oligomers, hardener - polyethylene polyamine - PEPA (TU-49-2529-69 and TU-6-02-594), plasticizers-dibutyl phthalate - DBF (GOST 6726-66) and synthetic rubber SKN-40 and polyamide L-20, fillers - crystalline graphite (GOST 44404), talc (GOST 878-52), glass fiber (TU-11-191), quartz sand (GOST 8424- 72), kaolin (Angren deposit GOST 6138), asbestos chresatil (TU 38-11438-71), aluminum powder (PAK GOST 5494-11), cement, fluoroplast-4D, iron powder (PMZh-33 GOST 9849) and phosphogypsum- waste of the Almalyk phosphoric plant. The dispersion of the fillers varied within 3-5 microns.The dispersion of the fillers varied within 3-5 microns. To study the tribotechnical properties of composite polymeric materials and coatings, raw cotton of the C-6521 variety with a moisture content of 8.0-35.0% and a contamination of 1.0-3.0% was used as a counter body.
Scientific novelty of the research work:
the regularities of changes in the physical and mechanical properties of modified composite thermosetting polymeric materials and coatings made of them, depending on the type, content and ratio of polymeric and organomineral fillers and modes of ultrasonic treatment, were established and their correlations were revealed;
an effective two-stage method of ultrasonic processing of filled compositions and obtaining antifriction-wear-resistant composite thermoplastic materials based on local raw materials and production wastes has been developed;
by studying the regularities of the influence of the type, content and ratio of organomineral fillers, modes of ultrasonic treatment and technological parameters on the antifriction-wear-resistant properties of the composition, the optimal compositions of modified composite thermosetting polymer materials and coatings based on them for tribo-technical purposes have been developed;
it was revealed that the developed modified antifriction-wear-resistant composite thermosetting polymeric materials and coatings from them have good strength properties, low friction coefficient and high wear resistance in contact with raw cotton;
an effective technology has been developed for obtaining composite thermosetting polymeric materials and coatings modified with organomineral fillers and ultrasonic treatment for use in working bodies of cotton processing machines and mechanisms.