Keywords
natriy gipoxlorit
kimyoviy modifikatsiya
infraqizil spektroskopiya (IQ)
TGA/DTA tahlili
biodegradatsiyalanuvchi gidrogel
termik destruksiya
makromolekulyar karkas.
How to Cite
Abstract
Qishloq xo‘jaligida ekologik xavfsiz va biodegradatsiyalanuvchi superabsorbent gidrogellarni sintez qilish uchun asosiy xomashyo bo‘lgan makkajo‘xori kraxmalini kimyoviy faollashtirish jarayoni tadqiq etildi. Polimerning molekulyar zanjirini keskin parchalab yubormaslik uchun natriy gipoxlorit (NaOCl) ishtirokida, pH=9–10 muhitda oksidlash usuli qo‘llanildi. Olingan oksidlangan kraxmal namunasining strukturasi va termik chidamliligi Infraqizil (IQ) spektroskopiya hamda Termogravimetrik va Differensial termik tahlil (TG/DTA) yordamida o‘rganildi. IQ spektrdagi 997.20 cm⁻¹ chastotaga xos kuchli yutilish α 1,4-glikozid bog‘larining to‘liq saqlanganligini isbotladi. TG/DTA tahlillari asosida, modifikatsiya natijasida kraxmalning termik parchalanishi nisbatan pastroq haroratlarga (150–180°C) siljiganligi va kristallik darajasi pasayib, amorf faza ulushi ortganligi aniqlandi. Ushbu fizik-kimyoviy o‘zgarishlar modifikatsiyalangan kraxmal makromolekulasini kelgusi radikal payvand-sopolimerlanish reaksiyalari uchun o‘ta faol polimer karkasiga aylantirishi ilmiy asoslandi.References
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