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INTRODUCTIONPolymersinmediumathighdilutionhaveabroadrangeofapplicationsnowadays.Theywereusedaspourpointdepressantandviscosityre ducerofcrudeoilanditsproductssuchasEVAanditsderivatives(SunilKumer,1 989;Qianetal.,1 996;Qianetal.,1 996;Qietal.,1 992 ) ;dragreducerofwater… 相似文献
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