聚甲基丙烯酸正十八酯对新疆原油的降凝降粘作用及其微观结构的研究

STUDY ON THE MICROSTRUCTURE OF POLY(n-OCTADECYL METHACRYLATE) AND ITS ROLE OF REDUCING POUR POINT AND VISCOSITY FOR XINJIANG CRUDE OIL

用(13)~C-NMR测定并详细归属了聚甲基丙烯酸正十八酯(Poly(n-octadecyl methacrylate))的全同、间同和杂同立体异构体,求得其序列分布,结果与Bernoullian统计方法和FT-IR分峰方法所得结果一致。添加平均分子量为16×10~4的P(n-OMA)50μg/g,使新疆混合原油的凝点降低了25.5℃,粘度也有很大的下降。

The microstructure and sequence distribution of poly(n-octadecyl methacrylate)were determined by ^(13)C-NMR spectra for carbonyl carbons and quarternary carbons. Results were in good agreement with that calculated from Bernoullian statistics as well as by FT-IR determination. With 50μg/g of P(n-OMA) (average molecular weight=16×10~4) added in Xinjiang mixed crude oil, the pour point shows a maximum reduction of 25.5℃ (from 8℃ to —17.5℃ ), and viscosity also shows a substantial decrease.