CAJ | 학술논문

针对丁苯胶乳增韧剂存在的问题,合成了一种油井水泥胶乳增韧剂OWCL-1G并对其性能进行了评价.引入反应型乳化剂 2-丙烯酰胺基-2-甲基丙磺酸(AMPS),采用无皂乳液聚合,避免了传统乳液聚合中残存的乳化剂吸水后导致水泥石溶胀、软化、强度下降等不利后果.乳液热失重、抗盐性、冻融稳定性测试表明:OWCL-1G 耐热性良好,260,℃时开始分解,其抗盐达饱和,冻融稳定性良好.对含 OWCL-1G 水泥浆 API 失水量考察发现, OWCL-1G 具有一定的控失水能力,与降失水剂配伍使用可获得低滤失量水泥浆.抗压和抗折强度测试表明,水泥石抗折强度明显提升,说明 OWCL-1G 有效增强了水泥石的韧性.扫描电子显微镜(SEM)测试表明,胶乳颗粒在水泥微缝隙间形成绒状桥接结构,而纯水泥的水化产物没有这种结构.
침대정분효유증인제존재적문제,합성료일충유정수니효유증인제OWCL-1G병대기성능진행료평개.인입반응형유화제 2-병희선알기-2-갑기병광산(AMPS),채용무조유액취합,피면료전통유액취합중잔존적유화제흡수후도치수니석용창、연화、강도하강등불리후과.유액열실중、항염성、동융은정성측시표명:OWCL-1G 내열성량호,260,℃시개시분해,기항염체포화,동융은정성량호.대함 OWCL-1G 수니장 API 실수량고찰발현, OWCL-1G 구유일정적공실수능력,여강실수제배오사용가획득저려실량수니장.항압화항절강도측시표명,수니석항절강도명현제승,설명 OWCL-1G 유효증강료수니석적인성.소묘전자현미경(SEM)측시표명,효유과립재수니미봉극간형성융상교접결구,이순수니적수화산물몰유저충결구.
In order to overcome the limits of styrene-butadiene latex toughener,a cement latex toughener,OWCL-1G,used in oil wells was synthesized and its different physical and chemical properties were evaluated. OWCL-1G was prepared by the soap-free emulsion polymerization. A reactive emulsifier,2-acrylamido-2-methyl propane sulfo-nic acid(AMPS),was added to prevent water absorption of the residual emulsifier in traditional emulsion polymeri-zation,thereby avoiding swelling,softening and strength loss of cement. Some properties were tested,such as ther-mogravimetric(TG) analysis,salt resistance and freeze-thaw stability. The results show that OWCL-1G has good heat resistance and the decomposition temperature is at 260,℃,and it can keep stabilization in saturated salt water and has good freeze-thaw stability. By examining the API fluid loss,OWCL-1G was observed to have the capability to control water loss. The grouts with low filtration could be obtained by the compatibility between OWCL-1G and filtrate reducers. Experimental results of compressive and flexural strengthsshow that the flexural strength of cement stone significantly increased,suggesting that OWCL-1G can effectively improve the cement toughness. Scanning electron micrographs(SEM)tests reveal that the latex particles could provide the floss-like linking in numerous small cracks of cement,but no linking occurred in the hydration products of pure cement.