The Quantitative Analysis of Fatty Acids in Styrene Butadiene Rubber(SBR)by Thermally Assisted Hydrolysis and Methylation GC/MS

摘要

Several additive packages are introduced into the Styrene-Butadiene Rubber(SBR)to vary the chemical and physical properties of the polymer.The qualitative and quantitative analysis of these additives requires sample pretreatment,such as solvent extraction,to isolate or concentrate the additives of interest.When analyzing SBR for the total amount of fatty acids,the sample is first extracted using ethanol/toluene followed by titration;however,this method requires large amounts of solvent,excessive analyst time,and can be prone to contamination.This additional sample handling reduces laboratory productivity and information obtained exhibits poor precision and accuracy.In response to these analytical challenges,Reactive Pyrolysis-GC/MS(RxPy)with TMAH(Tetramethylammonium hydroxide)method was developed by the multi-mode pyrolyzer.This presentation will demonstrate the efficacy and viability of reactive pyrolysis GC/MS of a vulcanized SBR sample using TMAH for rapid and straightforward determination of free fatty acids.In fact,free fatty acids contained in a vulcanized rubber product will be determined as methyl derivatives by Thermally Assisted Hydrolysis and Methylation-GC/MS with no need for solvent extraction.