纳米聚（二乙烯苯-甲基丙烯酸十八酯）降黏剂的合成及其降黏效果

采用乳液聚合及酯交换方法合成了纳米聚(二乙烯苯-甲基丙烯酸十八酯)油溶性降黏剂。采用傅里叶变换红外光谱和透射电子显微镜对其进行表征，并测定其对大庆稠油和胜利稠油的降黏效果。结果表明，该合成聚合物为粒径165 nm左右的纳米小球。在温度40℃、最佳加入量条件下，该降黏剂对大庆稠油的表观降黏率为72.92%，净降黏率为49.91%；对胜利稠油的表观降黏率为80.29%，净降黏率为48.54%，均优于市售乙烯-乙酸乙烯酯共聚物降黏剂。该降黏剂是一种降黏效果较好的通用型降黏剂。

Synthesis and Viscosity Reducing Properties of Poly (Divinyl Benzene-Methyl Octadecyl Acrylate) Nanoviscosity Reducer

Nanoscale poly(divinyl benzene-methyl octadecyl acrylate) was synthesized via emulsion polymerization and transesterification method. The synthesized polymer was characterized by Fourier transform infrared spectrometer and transmission electron microscopy, and its viscosity reducing effect as a viscosity reducer for Daqing heavy oil and Shengli heavy oil was determined. The results showed that the polymer was of the sphere particle with the diameter of 165 nm. At 40℃ with optimum dosage, its apparent viscosity reduction rate and the pure viscosity reduction rate were 72.92% and 49.91%, respectively, for Daqing heavy oil, while for Shengli heavy oil, the viscosity reduction rate and the pure viscosity reduction rate were 80.29% and 48.54%, respectively. Compared with the commercial viscosity reducer ethylene-vinyl acetate copolymer, the synthesized polymer exhibited better viscosity reducing effect. So it was proved that the synthesized nanoscale polymer was a universal viscosity reducer with an excellent viscosity reduction effect.