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POLIPROPILEN PLYONKASI BILAN LAMINATSIYALANGAN KARTONNING TERMIK VA FIZIKMEXANIK XOSSALARI

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MAQOLA ANNOTATSIYASI

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Qatlamlarni yopishtirish uchun etilenning vinilatsetat bilan sopolimeri (PEVA) eritasidan va himoya qatalmi uchun polipropilen plenkadan foydalangan holda laminatsiyalangan karton olingan. Termografimetrik (TGA) va differensial-termik (DTA) tahlil ma’lumotlari bо‘yicha boshlang‘ich materiallar va mahsulotning termik xossalari tadqiq qilingan. TGA egri chiziqlari 342o С gacha polipropilenning va 201o С gacha PEVA termik barqarorligini kо‘rsatdi, bunda ikkala polimerda ham massaning yо‘qotilishi 0,5% gacha bо‘lgan qiymatni tashkil qiladi. Polipropilenning erishi 165-170o С, PEVA erishi esa 80-85o С haroratda kechadi, bunda massaning yо‘qotilishi va endotermik effektlar kuzatilmaydi. 260o С dan yuqori haroratda ishlatilgan kartonning intensiv parchalanishi kuzatiladi, bunga qadar namuna namlik hisobiga 5,8% massa yо‘qotadi. Kartonni qizdirishda erish yoki kristallanishning fazaviy о‘tishlari kuzatilmadi, 260-600o С intervalda intensiv oksidlanish, keyin esa 386o S da ekzotermik effektli kuyish kuzatildi. Komponentlarning termik xossalarini hisobga olgan holda laminatsiyalangan kartonni shakllantirish uchun 90-100o С harorat tanlandi. Sanoat namuna-analogi bilan taqqoslagan holda laminatsiyalangan kartonning fizik-mexanik xossalari tadqiq qilindi. Sanoat namunasi xuddi shu kartondan, lekin yelim-eritma surtilgan xorijiy laminatsiyalovchi plenkadan foydalangan holda olingan. Kartonning yuzasidan polipropilen plenkasini yirtib olish kuchi tajribaviy namuna uchun 6,6 N va sanoat namuna-analogi uchun 5,5 N ni tashkil qiladi. Ikkitali bukishlar soni (120 dan kо‘p) va yedirish kuchi (5,12 kPa·m2 /g) sanoat namuna-analogiga nisbatan yuqoriroq bо‘ldi.

MUALIFLAR

Teglar

# адгезия# adhesion# термостойкость# картон# cardboard# Laminate# polypropylene film# ethylene-vinyl acetate copolym# heat resistance# Laminat# karton# polipropilen plenka# etilenning vinilatsetat bilan # termochidamlilik# adgeziya# Ламинат# полипропиленовая пленка# сополимер этилена с винилацет

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Maqola idintifikatorlari

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