Abstract
Near edge X-ray absorption fine structure (NEXAFS) spectra were obtained using synchrotron radiation for poly(butylene terephthalate) (PBT), UV-irradiated PBT, and 4,4'-biphenyldicarboxylic acid dimethyl ester (PAM), which is a model compound of PBT. The spectrum of PBT were interpreted with the comparison of the polarized NEXAFS spectra of an oriented film of PAM. The polarization dependence of the peak previously assigned to 3p / rydberg state suggested its σ° nature. The spectra of PBT drastically changed by UV irradiation, indicating that chemical species like benzaldehyde were formed on the PBT surface. These results demonstrate that NEXAFS spectroscopy is very useful also in the field of surface photochemistry.
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