Fig. 2
Characteristics of tyre treads from summer, studless and studded winter tyres. (A) The proportion of natural and synthetic rubber from tyres measured with TGA-FTIR (diagram) and with Py-GCMS (pie charts). (B) FTIR spectra of tyre treads. (C) Two polymeric phases in tyre tread revealed with SEM using the EsB detector. (D) SEM–EDS with elemental constitution of tyre treads and (E) Polymeric content measured by TGA and Py-GCMS as a function of hardness (shore value). Tyre photos from http://www.pirelli.com