Abstract

Dynamic FT-IR spectra of uniaxially 5 X -drawn poly(ethylene terephthalate) (PET) film at a temperature of 30 to 150 C were measured with the use of a variable-temperature polymer stretcher, and amplitude spectrum analyses of the dynamic spectra were carried out. A drastic decrease in dynamic variations of the trans C-O stretching band was observed above the glass-to-rubber transition temperature. This observation suggests that the trans C-O bond in the ethylene glycol unit is closely related to changes in macroscopic mechanical properties of PET film in the glass-to-rubber transition.

Recent applications of FT-IR spectroscopy to polymer systems

J. L. Koenig and M. K. Antoon
Appl. Opt. 17(9) 1374-1385 (1978)

Effects of prestrain applied to poly(ethylene terephthalate) substrate on microstructures and morphologies of porous TiO₂ film and optical scattering behaviors of light

Tse-Chang Li, Cheng-Fang Ho, and Jen-Fin Lin
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Cost-effective way to improve the optical properties of poly(methyl methacrylate)/poly(ethylene terephthalate) light scattering materials: drop coalescence

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Investigation of the optothermal properties of a new polymeric blend: polymethyl-methacrylate–poly(ethylene-co-vinylacetate)

U. Bernini, G. Carbonara, M. Malinconico, P. Mormile, P. Russo, and M. G. Volpe
Appl. Opt. 31(27) 5794-5798 (1992)

Real-time observation of structural change in semi-crystalline polymer films through mid-IR transmission spectroscopy: determination of instantaneous film temperature during recrystallization

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Opt. Express 26(17) 21615-21625 (2018)