STRESS–STRAIN CHARACTERISTICS OF ISOTACTIC POLYPROPYLENE J-170T AND BLOCK - COPOLYMER PROPYLENE WITH JM-370 ETHYLENE, DEPENDING ON TEMPERATURE AND EXTRUSION NUMBER

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Abstract

Polypropylene (PP), thanks to the physicist-mechanical and temperature characteristics, are widely used in mechanical engineering and the electrical industry. In the process of thermal exposure due to degradation of PP macromolecules, a loss of elastic strength characteristics is observed. It was shown that the influence of extrusion temperatures (170-200 0С) and extrusion numbers (up to 7 cycles) lead to a strengthening of a number of mechanical properties for isotactic PP (J-170T) and practically do not affect the block copolymer of propylene with ethylene. The data obtained are of interest for the selection of polypropylene recycling conditions.

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Berdinazarov К., Normurodov Н., Khakberdiev Э., Sadykov Ш., Ashurov Н., & Riskulov А. (2020). STRESS–STRAIN CHARACTERISTICS OF ISOTACTIC POLYPROPYLENE J-170T AND BLOCK - COPOLYMER PROPYLENE WITH JM-370 ETHYLENE, DEPENDING ON TEMPERATURE AND EXTRUSION NUMBER. SCIENCE AND INNOVATIVE DEVELOPMENT, 3(4), 176–184. Retrieved from https://ilm.mininnovation.uz/index.php/journal/article/view/212
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