Abstract
AbstractThe evolution of FTIR spectra of PS during oxidation is studied in the range 450‐1300 cm–1. We show that the small scale of the PS structure leads to a significant scattering cross section for Fröhlich surface modes associated to stretching modes in siloxane bridges. The kinetics of the evolution of both bulk‐ and surface‐related modes are studied using Principal Component Analysis. As a result, two independent components are found, one of them related to TO modes associated to silicon oxide covering large structures and the other one associated to the oxidation of a distribution of prolate ellipsoids with nanoscopic size. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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