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Mazkur maqolada polipropilen (PP) va qatlamli silikatlar asosida polimer kompozitsion materiallarning melt mixing usuli orqali olinishi bayon qilingan. Malein angidrid payvandlangan polipropilen (MA-p-PP) kompatibilizator (moslashtirgich) sifatida ishlatildi va kompatibilizator miqdorining qatlamlararo turli xil zichlikdagi modifikator joylashgan ikki turdagi qatlamli silikatlar asosidagi kompozitlarining termik va mexanik xususiyatlariga ta’siri o‘rganildi. Kompozit tarkibidagi to‘ldiruvchi miqdori o‘zgarmas 3 % ni tashkil qilgan holda, kompatibilizator 3, 6, 9 va 12 % gacha o‘zgartirildi. Modifikatorning zichligi yuqoriroq bo‘lgan qatlamli silikat Cloisite15A interkalatsiyalangan tuzilmalarni hosil qildi. Modifikatorning zichligi nisbatan pastroq bo‘lgan Cloisite20A da esa, asosan, eksfoliatsiyalangan nanokompozitlar olishga erishildi. Nanostrukturaning shakllanishi termik barqarorlikning sezilarli darajada o‘sishiga olib keldi (50 % vazn yo‘qotish polipropilen va uning asosidagi nanokompozitlar uchun mos ravishda 360 °C va 430 °C haroratlarda kuzatiladi). Nanokompozitlarning mexanik xususiyatlari tahlili elastiklik modulning 15–20 % ga oshishi va bu ta’sir eksfoliatsiyalangan tuzilmalar uchun yaqqolroq namoyon bo‘lishini ko‘rsatdi. Oquvchan holatga o‘tish kuchlanishi amalda o‘zgarmasdan saqlanib qolgan holda, elastik deformatsiya sezilarli darajada kamaydi.

  • O'qishlar soni30
  • Nashr sanasi14-04-2023
  • Asosiy tilO'zbek
  • Sahifalar42-52
Ўзбек

Mazkur maqolada polipropilen (PP) va qatlamli silikatlar asosida polimer kompozitsion materiallarning melt mixing usuli orqali olinishi bayon qilingan. Malein angidrid payvandlangan polipropilen (MA-p-PP) kompatibilizator (moslashtirgich) sifatida ishlatildi va kompatibilizator miqdorining qatlamlararo turli xil zichlikdagi modifikator joylashgan ikki turdagi qatlamli silikatlar asosidagi kompozitlarining termik va mexanik xususiyatlariga ta’siri o‘rganildi. Kompozit tarkibidagi to‘ldiruvchi miqdori o‘zgarmas 3 % ni tashkil qilgan holda, kompatibilizator 3, 6, 9 va 12 % gacha o‘zgartirildi. Modifikatorning zichligi yuqoriroq bo‘lgan qatlamli silikat Cloisite15A interkalatsiyalangan tuzilmalarni hosil qildi. Modifikatorning zichligi nisbatan pastroq bo‘lgan Cloisite20A da esa, asosan, eksfoliatsiyalangan nanokompozitlar olishga erishildi. Nanostrukturaning shakllanishi termik barqarorlikning sezilarli darajada o‘sishiga olib keldi (50 % vazn yo‘qotish polipropilen va uning asosidagi nanokompozitlar uchun mos ravishda 360 °C va 430 °C haroratlarda kuzatiladi). Nanokompozitlarning mexanik xususiyatlari tahlili elastiklik modulning 15–20 % ga oshishi va bu ta’sir eksfoliatsiyalangan tuzilmalar uchun yaqqolroq namoyon bo‘lishini ko‘rsatdi. Oquvchan holatga o‘tish kuchlanishi amalda o‘zgarmasdan saqlanib qolgan holda, elastik deformatsiya sezilarli darajada kamaydi.

Русский

В данной работе полимерные композиционные материалы на основе полипропилена (ПП) и слоистых силикатов получены методом смешения в расплаве. В качестве компатибилизатора использовали полипропилен, привитый малеиновым ангидридом (МА-п-ПП), и изучали влияние количества компатибилизатора на термические и механические свойства композитов на основе двух типов слоистых силикатов с модификаторами различной межслоевой плотности. Компатибилизатор был изменен на 3, 6, 9 и 12 %, в то время как количество наполнителя в композите осталось неизменным на уровне 3 %. Cloisite15A, слоистый силикат с более высокой плотностью модификатора, дает интеркалированные структуры, в то время как Cloisite20A, с относительно более низкой плотностью модификатора, дает в основном расслоенные нанокомпозиты. Формирование наноструктуры привело к значительному увеличению термостойкости (50 % потери массы наблюдается при температурах 360 и 430 °С для полипропилена и нанокомпозитов на его основе соответственно). Анализ механических свойств нанокомпозитов показал, что модуль упругости увеличивается на 15–20 %, причем этот эффект более выражен для расслоенных структур, предел текучести остается практически неизменным, наблюдается значительное снижение упругой деформации

English

In this work, polymer composite materials based on polypropylene (PP) and layered silicates were obtained by melt mixing method. The research looked into the effect of the amount of compatibilizer on thermal and mechanical properties of composites based on two types of layered silicates with modifiers of different interlayer densities, with maleic anhydride grafted polypropylene (MA-p-PP), which was used as a compatibilizer. The compatibilizer was changed to 3, 6, 9 and 12 % while the amount of filler in the composite remained 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. Forming of the nanostructure led to a significant increase in thermal stability (50 % weight loss was observed at temperatures of 360 and 430 °C for polypropylene and its based nano-composites, respectively). The analysis of the mechanical properties of nanocomposites showed that the elastic modulus increases by 15–20 %, and this effect is more expressive for exfoliated structures, however, the yield stress remains practically unchanged, and a significant decrease in elastic deformation is observed.

Havola nomi
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