Abstract
AbstractESCA spectra of poly(vinylidene fluoride), polytetrafluoroethylene and copolymers of tetrafluoroethylene and ethylene were observed. CK peaks of them were split into doublets, which were assigned to CF2 units in crystalline regions and the convolution of CF2 units in amorphous regions and CH2 units in the polymers as a whole. The degree of crystallinity was estimated according to the above assignment and compared with that from diffraction patterns. The chemical shifts of CK peaks were qualitatively compared with the critical surface tension. OK peaks were also observed in the polymers examined, and the relative intensities of them could be correlated with the content of absorbed gas such as O2, H2O, and others.
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