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 Whentheflowpropertiesofpolymermeltsandsolutionscanbemeasuredoverawideenoughrangeofshearing,thelogarithmicflowcurvesappearasinFigure14.1.Itisgenerallyobservedthat:(1)Atlowshearrates(orstresses),a‘lowerNewtonian’regionisreachedwithaso-calledzero-shearviscos (共 7205 字) [閱讀本文] >>