Фан: Техника фанлари

Mechanical and thermal properties of composites based on layered silicates and isotactic polypropylene
Berdinazarov Qodirbek Nuridin ugli
PhD student
Uzbekistan Academy of Sciences, Institute of Polymer Chemistry and Physics, ,7^“b”, str. A.Kadyri,Tashkent,100128.
е-mail: [e-mail] [phone]


Khakberdiev Elshod Olmosovich
PhD
Uzbekistan Academy of Sciences, Institute of Polymer Chemistry and Physics, ,7^“b”, str. A.Kadyri,Tashkent,100128
Senior researcher,


Normurodov Nurbek Fayzullo ugli
PhD student
Uzbekistan Academy of Sciences, Institute of Polymer Chemistry and Physics, ,7^“b”, str. A. Kadyri, Tashkent,100128,
Dusiyorov Nizomiddin Zokir ugli
Junior researcher
Uzbekistan Academy of Sciences, Institute of Polymer Chemistry and Physics, ,7^“b”, str. A. Kadyri, Tashkent,100128,
Ashurov Nigmat Rustamovich
Doctor of Science (Technical), professor
Uzbekistan Academy of Sciences, Institute of Polymer Chemistry and Physics, ,7^“b”, str. A. Kadyri, Tashkent,100128.

Abstract: In this work, polymer composite materials based on polypropylene (PP) and layered silicates were obtained by melt mixing method.Maleic anhydride grafted polypropylene (MA-p-PP) was used as a compatibilizer, and the effect of the amount of compatibilizer on the thermal and mechanical properties of composites based on two types of layered silicates with modifiers of different interlayer densities was studied. The compatibilizer was changed to 3, 6, 9 and 12% while the amount of filler in the composite was unchanged at 3%. Cloisite15A, a layered silicate with a higher modifier density, produced intercalated structures, while Cloisite20A, with a relatively lower modifier density, produced mostly exfoliated nanocomposites. The formation of the nanostructure led to a significant increase in thermal stability (50% weight loss is observed at temperatures of 360°C and 430°C for polypropylene and its based nanocomposites, respectively). The analysis of the mechanical properties of nanocomposites showed that the elastic modulus increases by 15-20%, and this effect is more pronounced for exfoliated structures, while the yield stress remains practically unchanged, and a significant decrease in elastic deformation is observed.