New insights into the development of ordered structure in poly(ethylene terephthalate), II Results from transmission infrared spectroscopy of thin films

Cole, Kevin P.; Ajji, Abdellah; Pellerin, E.

doi:10.1002/1521-3900(200208)184:1<1::aid-masy1>3.0.co;2-o

Cited by 33 publications

(50 citation statements)

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“…Fig. 4 shows that F trans is 14.5% before stretching, in agreement with published data for amorphous PET [23,24]. The fraction of trans conformers increases during deformation at the expense of gauche conformers and reaches a maximum value of $17%.…”

Section: Resultssupporting

confidence: 88%

Time-resolved polymer deformation using polarized planar array infrared spectroscopy

Farbos

Mauran

Pellerin

2009

Vibrational Spectroscopy

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Section: Resultssupporting

confidence: 88%

Time-resolved polymer deformation using polarized planar array infrared spectroscopy

Farbos

Mauran

Pellerin

2009

Vibrational Spectroscopy

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“…The peaks at 873 (872:TC, 873-4:TX), 2908 (2908:TC, 2909:TX) and 2973-2966 cm À1 (2970:TC, 2975:TX) are attributed jointly to trans crystalline and non-crystalline segments [34,35]. The peak at around 873 cm À1 has also been reported for the gauche structure.…”

Section: Absorption Peaks Attributed Jointly To the Txtc Structuresmentioning

confidence: 64%

“…The abovementioned peak is attributed to vibrations of the trans crystalline (TC), trans noncrystalline (TX), and gauche (G) structures [35]. The peak at 2959 cm À1 (C-H stretching vibration of the glycol groups) was utilized for calculation of the population of the gauche segments.…”

Section: Resultsmentioning

confidence: 99%

“…The peak at 3103 cm À1 (3102:TX, 3103:G) [35] is attributed to trans non-crystalline and gauche conformations. In addition, the peak at 877 cm À1 most probably arises from an overlapping of peaks of the gauche and trans non-crystalline conformations (876:G, 879:TX) [34,35].…”

Section: Absorption Peaks Attributed Jointly To the Gtx Structuresmentioning

confidence: 99%

“…In addition, the peak at 877 cm À1 most probably arises from an overlapping of peaks of the gauche and trans non-crystalline conformations (876:G, 879:TX) [34,35]. The absorption values of the above peaks will hereafter be addressed as A GTX .…”

Section: Absorption Peaks Attributed Jointly To the Gtx Structuresmentioning

confidence: 99%

See 2 more Smart Citations

Uniaxially stretched PET/PET-MWNT nanocomposites: Effect of the MWNTs on the chain conformations of PET

Tzavalas

Gregoriou

2008

Vibrational Spectroscopy

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Characterization of molecular orientation in injection–stretch–blow‐molded poly(ethylene terephthalate) bottles by means of external reflection infrared spectroscopy

Daly

Cole

Nguyen

et al. 2007

J of Applied Polymer Sci

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The molecular orientation at the outer surface of injection-stretch-blow-molded bottles made from poly(ethylene terephthalate) was characterized and quantified by means of front-surface reflection infrared spectroscopy based on a method developed previously. Results were obtained for two different bottle shapes (cylindrical and rectangular) molded at different injection mold temperatures (16, 38, and 608C). For the cylindrical bottles, the preferred molecular chain orientation was found to be in the axial direction, with the Hermans orientation function near 0.3 for all three mold temperatures. For the less symmetrical rectangular bottles, a significant difference was observed between the large and small faces. For the large face, the orientation was mainly in the hoop direction; the Hermans orientation function was in the range of 0.3-0.5 and was essentially the same at all mold temperatures and positions along the bottle height. For the small face, on the other hand, the preferred orientation changed from the hoop direction near the bottom to the axial direction near the top, and the variation was more pronounced at lower mold temperatures. The utility of the front-surface reflection technique was clearly demonstrated. It was also applied, with the use of an infrared microscope, to examine the orientation gradient across the wall thickness.

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New insights into the development of ordered structure in poly(ethylene terephthalate), II Results from transmission infrared spectroscopy of thin films

Cited by 33 publications

References 0 publications

Time-resolved polymer deformation using polarized planar array infrared spectroscopy

Time-resolved polymer deformation using polarized planar array infrared spectroscopy

Uniaxially stretched PET/PET-MWNT nanocomposites: Effect of the MWNTs on the chain conformations of PET

Characterization of molecular orientation in injection–stretch–blow‐molded poly(ethylene terephthalate) bottles by means of external reflection infrared spectroscopy

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