Structural Information on the Transition Moments in Poly(ethylene-2,6-naphthalene) by Polarization FT-IR Spectroscopy |
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| Authors: | Alex Scott Chady Hakme Isabelle Stevenson Alison Voice |
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| Institution: | 1. IRC in Polymer Science & Technology, School of Physics & Astronomy, University of Leeds, Leeds, LS2 9JT, UK;2. Laboratoire des Matériaux Polymères et des Biomatériaux, UMR CNRS 5627, Bât. ISTIL;3. 43, Bld du 11 novembre 1918;4. 69622 Villeurbanne Cedex, France |
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| Abstract: | Oriented poly(ethylene-2,6-naphthalate) (PEN) has been characterised by polarised FT-IR spectroscopy to determine the structural angles of the transition moments to the molecular chain axis. The bands at 1130 cm?1, 1142 cm?1 and 1602 cm?1, which have been previously assigned as having their transition dipole moments parallel to the chain axis, are confirmed as parallel bands. Bands at 767 cm?1 and 831 cm?1 are confirmed as perpendicular bands. However the band at 1708 cm?1 which has previously been assigned as a perpendicular band, is shown here to have its transition moment at 72° to the molecular axis. |
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| Keywords: | FT-IR molecular orientation poly(ethylene-2 6-naphthalate) refractive index uniaxial |
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