Compositionalanalysisbythermogravimetry(TG)isawidelyusedtechniquefordeterminingthecompositionofmaterialsbasedontheirthermaldecompositionbehavior.AsdescribedinASTMSTP997,thismethodinvolvesmeasuringtheweightchangesofasampleasitissubjectedtoacontrolledtemperatureprograminaspecificatmosphere(e.g.,nitrogen,air,oroxygen).Theresultingthermogravimetriccurveprovidesvaluableinformationaboutthethermalstability,decompositionsteps,andcompositionofthesample,includingthequantificationofvolatilecomponents,fillers,andinorganicresidues.Thetechniqueisparticularlyusefulforanalyzingpolymers,composites,andothermulti-componentsystems,offeringrapidandreproducibleresultswithminimalsamplepreparation.ASTMSTP997providesstandardizedproceduresandguidelinesforperformingandinterpretingthermogravimetricanalysistoensureconsistencyandaccuracyincompositionaldetermination.
