Multifaceted analysis of styrene butadiene rubber (SBR) product using FD and Pyrolysis-GC-MS method of JMS-T2000GC
Introduction
SBR is a synthetic rubber made from a copolymer of styrene and 1,3-butadiene. It is used in many products, such as automobile tires, because it is easy to process and can be supplied at a low cost and of high quality. When used as a product, it is common to blend it with other polymers and add additives to improve physical properties and vulcanization speed.
In this MSTips, we will introduce an application of SBR analysis using FD and Pyrolysis-GC-MS method of the JMS-T2000GC. In the FD method, the sample is applied to the emitter and directly introduced into the ion source, and then detected by soft ionization. It is possible to detect molecular ions peak in less than one minute. When measuring polymers such as SBR, a complex mass spectrum containing multiple peaks from oligomers is obtained. Even in this case, qualitative information can be easily obtained by KMD analysis. The main component styrene-butadiene copolymer can be visually evaluated the molecular weight distribution due to the difference of end group and degree of polymerization, and other ion peaks can be qualitatively analyzed by composition estimation. Although it is difficult to obtain the structural formula using the FD method alone, it is possible to obtain it efficiently using the Pyrolysis-GC-MS method in combination. Furthermore, these two methods can complement the range of measurable mass (= boiling point), making multifaceted analysis possible.