摘要
用自由基水溶液聚合法,合成了2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和衣康酸(IA)的二元共聚物缓凝剂(PAI),并用红外光谱表征了其结构。通过正交实验,得到共聚反应的最佳条件为:n(AMPS):n(IA)=75:25,引发剂用量1%,反应温度55℃,反应时间4h。用柠檬酸(CA)复配改性了共聚物,130℃下的稠化试验发现,缓凝剂加量均为1%的水泥浆,加入经复配改性后的缓凝剂(CMPAI)后,稠化时间长达277min,而直接加入共聚物缓凝剂的稠化时间仅有148min。分析探讨了复配缓凝剂的作用机理。经性能测试发现,复配缓凝剂(CMPAI)还有增强水泥浆流动度的作用。
The copolymers(PAI) of 2-acrylamide-2-methyl propanesulfonic acid(AMPS) and itaconic acid(IA) were synthesized by free radical aqueous solution copolymerization,and its structure was characterized by IR.Through orthogonal experiment,the optimum reaction conditions of copolymerization were obtained with:n(AMPS):n(IA)=75:25,initiator 1%,reaction temperature 55℃,time 4h.The copolymers were modified by citric acid(CA),the thickening tests at 130℃ showed that the thickening time of the cement slurry with modified copolymers(CMPAI) was as long as 277min but that the untreated copolymers was only 148min even both contained 1% BWOC retarder.Then the retardation mechanism of the modified retarder(CMPAI) was discussed.At last,the influence of the modified retarder(CMPAI) on increasing fluidity of cement slurries was proven through experiment.
出处
《石油与天然气化工》
CAS
CSCD
2009年第4期331-334,共4页
Chemical engineering of oil & gas
基金
山东胜油固井工程技术有限公司助研基金
西南石油大学科研基金(No.2007XJZ119)资助项目
关键词
IA
AMPS
共聚
柠檬酸
复配改性
缓凝剂
IA,AMPS,copolymerization,citric acid,composition modification,retarder
