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Pyrolysis Infra-red (PIR) is a method of polymer identification where the sample is thermally decomposed and the products of the thermal decomposition are analysed by Infrared (IR) spectroscopy.

Rubber compounds are complex material which apart from polymer contain fillers and other ingredients that may mask the type of the polymer when examined by Infrared (IR) spectroscopy. In P-IR method the sample is heated in a furnace tube at constant temperature. 

A stream of nitrogen passes over the sample and the condensed evolved fumes which are then examined by IR spectroscopy. 

The infrared spectrum of the pyrolysate is compared with reference spectra which are published in the referenced Standards.

The method is accredited to ISO17025 by UKAS.

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  • Polymer identification/confirmation
  • Polymer blend analysis
Colin Hull

Our Expert

Colin Hull

Email: chull@tarrc.co.uk or info@rubberconsultants.com