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时间:2020-04-30
《剪切作用对功能聚合物微观结构性能的影响研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第41卷第4期燃料化学学报V01.41NO.42013年4月JournalofFuelChemistryandTechnologyApr.2013文章编号:0253—2409(2013)04-0449-07剪切作用对功能聚合物微观结构性能的影响研究李美蓉,黄漫,曲彩霞,曹绪龙,张继超,刘坤(1.中国石油大学(华东)理学院,山东青岛266580;2.中国石化胜利油田地质科学研究院,山东东营257015)摘要:梳型聚合物和活性聚合物是目前常用驱油聚合物,其增黏性和黏弹性是评价其驱油能力的重要指标。为考察剪切作用对两种聚合物溶液
2、性能的影响,分别研究了梳型聚合物和活性聚合物溶液经过模拟炮眼剪切前后的宏观和微观性能变化。结果表明,在高速剪切、拉伸应力作用下,梳型聚合物黏度损失率为40.73%,活性聚合物黏度损失率为70.10%;当剪切频率为0.02Hz时,梳型聚合物界面扩张弹性降低了19.03%,而活性聚合物界面扩张弹性降低了68.03%;相比活性聚合物,梳型聚合物紧密的空间网状结构虽被部分破坏,但仍有疏松的网络结构,且以聚集体的形式紧密地分散在溶液中,通过DLS及AFM测定表明其粒径尺寸稍有变小;可见梳型聚合物抗剪切能力较活性聚合物强。关键词:梳型
3、聚合物;活性聚合物;炮眼剪切;黏度;界面扩张弹性中图分类号:O631.13文献标识码:AEfleetofshearactiononthemicrocosmicstructureandperformanceoffunctionalpolymerusedinoildisplacementLIMei.rong,HUANGMan,QUCai—xia,CAOXu—long。,ZHANGJi-chao,LIUKun(1.CollegeofScience,ChinaUniversityofPetroleum(EastChina),Qin
4、gdao266580,China;2.GeologicalScientificResearchInstituteShengliOilfield,SINOPEC,Dongying257015,China)Abstract:Comb.shapedpolymerandreactivepolymeraretwokindsofpolymerswidelyusedinthetertiaryrecoveryprocessatpresentandtheirviscosityandviscoelasticityareimportantind
5、exesforevaluatingtheoildisplacementeficiency.Toinvestigatetheeffectofshearactiononthepropertiesofpolymersolutions,themacroscopicandmicrocosmicpropertiesofthecomb.shapedpolymerandreactivepolymer,beforeandaftersheafingthroughthesimulatedholecut,werecompared.Theresul
6、tsshowedthatathigh.speedsheafingandtensilestress.theviscositiesofthecomb—shapedpolymerandthereactivepolymeraredecreasedby40.73%and70.1O%.respectively.Withashearfrequencyof0.02Hz,theinterfacialdilatationalelasticitiesofthecomb-tvpepolymerandthereactivepolymerarered
7、ucedby19.03%and68.03%,respectively.Comparedwiththereactivepolymer.thecomb—shapedpolymerstillexhibitsaloosennetworkstructureandispresentasaggregatesdispersedinthesolutionaftersheafing.thoughitssuper.molecularstructureispartiallydestroyed;theparticlesizeofthecomb—sh
8、apedpolymer,asmeasuredbyDLSand删,isonlyslightlyreduced.Thesesuggestthatthecomb.shapedpolymerhasasuperiorshearperformancetothereactivepolymer.Keywords:com
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