XITOZAN VA AKRIL-STIROL SOPOLIMERLARI ASOSIDAGI DEPRESSOR QO‘NDIRMALARNING BIODIZEL YOQILG‘ISINING QUYI HARORATLI XOSSALARIGA TA’SIR MEXANIZMI
Keywords:
depressor qo‘ndirma, xitozan, akril kislota, stirol, sopolimer, biodizel yoqilg‘i, quyi haroratli xossalar, n-parafin kristallari, adsorbsiya, sokristallanish, nukleatsiya, polyarizatsion mikroskopiya, loyqalanish harorati.Abstract
Maqolada xitozan va akril kislota (metakril kislota) – stirol asosida sintez qilingan sopolimer depressor qo‘ndirmalarning gidrotozalangan dizel yoqilg‘isining quyi haroratli xossalariga ta’sir mexanizmi tadqiq etilgan. Depressor prisadkalarning n-parafin uglevodorodlarining kristallanish jarayoniga ta’siri optik va polyarizatsion mikroskopiya usullari yordamida o‘rganilgan. Adsorbsiya, sokristallanish va nukleatsiya mexanizmlari asosida sopolimer qo‘ndirmalar tarkibidagi funksional guruhlar – karboksil, amino, gidroksil va alkil radikallarning parafin kristallari morfologiyasiga ta’siri aniqlangan. Tadqiqot natijalari shuni ko‘rsatdiki, 70:30 mol nisbatidagi Xz:AK:ST sopolimerning 0,3 mass.% miqdori dizel yoqilg‘isining loyqalanish haroratini –5°C dan –12°C gacha, qotish haroratini –10°C dan –25°C gacha, filtrlanish chegaraviy haroratini –7°C dan –16°C gacha pasaytirishga erishilgan. Qo‘ndirmalar yoqilg‘ining asosiy fizik-kimyoviy xossalariga salbiy ta’sir etmasligi O‘zDSt 989:2010 standart talablari asosida tasdiqlangan.
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