The XPS (x–ray photoelectron spectroscopy) O1s spectrum of PET [poly(ethylene terephthalate)] was examined in detail. Spectra of related compounds were also studied for comparison. The O1s peak profile of asymmetric doublet with π–π * satellites characteristic of PET was successfully explained both from comparison with the observed O1s spectra of the related compounds and from ab initio δSCF calculation.
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Nakayama et al. (1990) studied this question.
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