FENOLFORMALDEGID ASOSIDAGI KREMNIYORGANIK OLIGOMER SINTEZI
Keywords:
fenol–formaldegid qatronlari, kremniyorganik oligomer, sol–gel usuli, siloksan, POSS, gibrid polimer, issiqlikka chidamlilik, gidrofoblik, kompozit materiallar.Abstract
Ushbu ishda fenol–formaldegid (FF) asosidagi kremniyorganik oligomerlarning sintezi, ularning tuzilish xususiyatlari va funksional xossalari yoritiladi. Fenolik qatronlarning yuqori mexanik mustahkamlik va termal barqarorlik kabi afzalliklari kremniyorganik fragmentlarning moslashuvchanlik, gidrofoblik va oksidlovchi muhitga chidamlilik kabi xossalari bilan birlashtirilgan. Sintez jarayonida kovalent bog‘lanish orqali modifikatsiya, sol–gel usuli yordamida noorganik tarmoq hosil qilish, siloksan segmentlarini graftlash hamda POSS nanobloklar bilan modifikatsiya qilish kabi yondashuvlar qo‘llanadi. Olingan gibrid oligomerlarning tuzilma–xossa bog‘liqligi FTIR, NMR, TGA/DSC va boshqa analitik usullar yordamida baholanadi. Natijalar FF asosidagi kremniyorganik oligomerlarning yuqori haroratga chidamli qoplamalar, past dielektrikli izolyatsion qatlamlar, maxsus yopishtirgichlar va olovga chidamli kompozit matritsalar ishlab chiqarishda katta salohiyatga ega ekanini ko‘rsatadi.
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