Crystallinity of poly (ethylene naphthalate) and its relation to terahertz absorption
D Odaka, Y Ohki, M Mizuno - Japanese journal of applied …, 2017 - iopscience.iop.org
D Odaka, Y Ohki, M Mizuno
Japanese journal of applied physics, 2017•iopscience.iop.orgThe crystallinity of poly (ethylene naphthalate)(PEN) was changed by thermal annealing and
its effects on terahertz absorption spectra and X-ray diffraction patterns were examined. As a
result, the intensity of a relatively sharp absorption peak at around 2.2 THz was found to be
proportional to the crystallinity. As a plausible cause of this absorption, a lattice vibration, a
torsional vibration, or their combination mode associated with (010) planes in crystal α of
PEN is proposed. Therefore, the crystallinity of PEN can be estimated from the intensity of …
its effects on terahertz absorption spectra and X-ray diffraction patterns were examined. As a
result, the intensity of a relatively sharp absorption peak at around 2.2 THz was found to be
proportional to the crystallinity. As a plausible cause of this absorption, a lattice vibration, a
torsional vibration, or their combination mode associated with (010) planes in crystal α of
PEN is proposed. Therefore, the crystallinity of PEN can be estimated from the intensity of …
Abstract
The crystallinity of poly (ethylene naphthalate)(PEN) was changed by thermal annealing and its effects on terahertz absorption spectra and X-ray diffraction patterns were examined. As a result, the intensity of a relatively sharp absorption peak at around 2.2 THz was found to be proportional to the crystallinity. As a plausible cause of this absorption, a lattice vibration, a torsional vibration, or their combination mode associated with (010) planes in crystal α of PEN is proposed. Therefore, the crystallinity of PEN can be estimated from the intensity of this absorption.
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