ABSTRACT
Asimpleexperimentalapproachhasbeendevelopedbasedonmeasurementofthe chargetransferredbyrubbing,theinitialpeaksignalobservedbyanearbyfieldmeterandof therateatwhichthissignaldecreasesasthechargedissipates.AchargeneutralisedPTFE rodisusedto'scuff,wipeorimpactthemiddleofanareaofstretchedsamplematerial directlyunderafieldmeterlOOmmabovethetestsurface.Observationsbythefieldmeter showabriefinitialexcursionasthePTFErodrisesfromthesurfacethenapolarityreversal, astherodisswungquicklyaway,uptoapeakvaluefromwhichthereadingdecaysas chargemigratesoutoverthesurfaceoftherubbedmaterial.
