ISSN:
0021-8995
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
The attenuated total reflection (ATR) technique has been used to obtain infrared spectra of heat-set poly(ethylene terephthalate) (PET) fibers. The trans and gauche content have been estimated from the absorbances of the trans band at 1342 cm-1, the gauche band at 1370 cm-1, and the internal standard band at 1410 cm-1. The trans orientation, as calculated from the dichroic ratios of the absorption bands at 1342, 972 and 846 cm-1, shows a decreasing trend with an increase in heat-setting temperature. The overall molecular orientation, as calculated from the absorption bands at 1410 and 875 cm-1, also decreases slightly with an increase in heat-setting temperature. The infrared data, in combination with X-ray data, have been used to calculate the amorphous orientation factor. The ATR technique is shown to give quite representative values of the amorphous orientation factor.
Zusätzliches Material:
5 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/app.1990.070411130
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