油溶性三元聚合物降粘剂的合成及评价

Synthesis and Evaluation of an Oil-soluble Terpolymer Viscosity Reducer

摘要:

以聚丙二醇和马来酸酐为原料，在对甲苯磺酸作催化剂的条件下，采用酸酐醇解法合成了马来酸酯。然后利用自制的马来酸酯与醋酸乙烯酯、丙烯酰胺共聚，合成了一种油溶性三元聚合物降黏剂，并用红外光谱法表征聚合物的组成特性。通过对其降黏效果的评价，得出最佳合成条件为：n(醋酸乙烯酯):n(丙烯酰胺):n(马来酸酯)= 6:2:1，引发剂用量为单体总质量的0.9%，反应温度75℃，反应时间6h；当温度为50℃，降黏剂加量为600mg/L时，稠油的黏度由3790mPa•s降到1110mPa•s，表现出了良好的降黏效果。

Abstract:

A new maleate was synthesized by polypropylene glycol and maleic anhydride under the condition that using p-toluene sulfonic acid as catalyzer . And then an oil-soluble terpolymer was synthesized by vinyl acetate, acrylamide and the maleate which was prepared before. The chemical structure of the copolymer was identified by IR spectrometric data. The optimum reaction conditions were obtained as follows : the monomer molar ratio of vinyl acetate, acrylamide and maleate was 6:2:1, with initiator dosage of 0.9%, polymerization temperature of 75℃and reaction time of 6 hours. The viscosity was decreased from 3790mPa•s to 1110mPa•s when the dosage of viscosity reducer was 600mg/L at 50℃.