Nitrile butadiene rubber (NBR) is used for manufacturing of industrial and automotive rubber products, for example, such as synthetic latex.
NBR is produced in an emulsion polymerization system.
The emulsion process yields a polymer latex, which is coagulated using various materials (e.g. calcium chloride and aluminum sulfate) to form crumb rubber, which is dried and compressed into bales.
By varying temperatures NBR producers manufacture hot and cold polymers. Specialty NBR polymers are obtained by adjusting ratios of Acrylonitrile (ACN) and butadiene (BD), or adding a third monomer (e.g. divinyl benzene and methacrylic acid).
Vaisala Polaris™ Process Refractometer serves to accurately and reliably determine the degree and the end-point of the polymerization reaction. The information is based on the conversion rate from monomer to polymer. This is determined by the relationship between conversion and the solids content (%) of the components involved.
Learn more about the nitrile butadiene rubber production from the application note.
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