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Application of ATR-IR to the Analysis of Surface Structure and Orientation in Uniaxially Drawn Poly(ethyleneterephthalate)

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Abstract:

A critical examination of the use of ATR-IR for the examination of surface composition and orientation in uniaxially drawn poly(ethyleneterephthalate) (PET) films has been performed. This work has identified the band at 1410 cm−1 as a satisfactory reference band in ATR-IR analyses for surface composition and orientation analyses in oriented PET films. Other commonly used reference bands at 790 and 1510 cm−1 have been shown to be influenced by both incident infrared polarization and orientation within the polymer films. Control of sample clamping pressure in a conventional ATR-IR clamp has been shown to afford optimized sample contact, needed in conjunction with the use of valid reference bands to obtain reproducible in-plane surface dichroism measurements of films with varying degrees of orientation.

Keywords: ATR; Infrared; PET; Poly(ethyleneterephthalate)

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702914336147

Affiliations: DuPont Company, Central Research and Development, CRD Experimental Station 326/135, Wilmington, Delaware 19880

Publication date: August 1, 1991

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