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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 50, Iss. 3 — Mar. 1, 1996
  • pp: 377–381

Dynamic Step-Scan Two-Dimensional Fourier Transform Infrared Studies of Uniaxially Drawn Poly(ethylene terephthalate) Film

Masashi Sonoyama, Kunihiro Shoda, Gen Katagiri, and Hideyuki Ishida

Applied Spectroscopy, Vol. 50, Issue 3, pp. 377-381 (1996)


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Abstract

Dynamic infrared spectra of uniaxially drawn poly(ethylene terephthalate) (PET) under a sinusoidal strain were examined. A very intense dynamic band at 973 cm<sup>-1</sup> assigned to the <i>trans</i> C-O stretching mode indicated stress-induced high mobility around the C-O bond in the ethylene glycol units. It was supposed that derivative-like skeletal bands observed in the dynamic spectra originated from the stress-induced frequency shift. Two-dimensional correlation analyses of the dynamic spectra were also carried out and revealed that the phenyl ring 18a band at 1018 cm<sup>-1</sup> and the phenyl ring 19b band at 1410 cm<sup>-1</sup> were composed of three and two independent components, respectively. The correlation peaks between the phenyl ring and CH<sub>2</sub> vibrational modes showed that orientation of the methylene group in the ethylene glycol unit, induced by mechanical stretching, is faster than that of the phenyl ring in the terephthalate unit.

Citation
Masashi Sonoyama, Kunihiro Shoda, Gen Katagiri, and Hideyuki Ishida, "Dynamic Step-Scan Two-Dimensional Fourier Transform Infrared Studies of Uniaxially Drawn Poly(ethylene terephthalate) Film," Appl. Spectrosc. 50, 377-381 (1996)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-50-3-377


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