✦ LIBER ✦

Raman spectra of high pressure phase and phase transition of polytetrafluoroethylene (teflon)

✍ Scribed by Chen-Kuang Wu; Malcolm Nicol

Publisher: Elsevier Science
Year: 1973
Tongue: English
Weight: 395 KB
Volume: 21
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(73)80036-3

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✦ Synopsis

Raman spectra of phases 11 and III of crystalhne polytetrafluoroelhylene at room temperature and several prep SUICS to 35 kbar are reported and drscussed m terms of the mformatron provided about molecular conformatron, crys+aI structures, and the phase transttron A revrsed vrbratronal assrgnment IS reported for phase II spectra whrch suggests that the 1215-and 1295-cm -' bands arc not fundamentals but are combrnatrons or overtones wrth Ar symmerry of a cychc group * The support provrded by U S Atomrc Energy Commrssron Contract AT(O4-3134, PA 88 IS gratefuLly acknowledged The authors are Indebted to Dr j F Twrsleton of Oxford Unrversrty fcr provrdmg us mth the samp!e and much of the avarlable lrteraturc on the properties of Teflon ** Contrtbutton No 3134 TEMPERATURE ("Cl

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