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Optical loss in rod-like polymer thin films
Optical thin films of three rod-like polymers, a rigid-rod polymer poly(p-phenylene benzobisthiazole) (PBZT), a diadamantane-substituted PBZT (DMT-PBZT) and a bicyclo[2.2.2]octane-substituted PBZT (BCO-PBZT), at different thicknesses were prepared with the solid-state coagulation process. In contras...
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Published in: | Polymer (Guilford) 1998-06, Vol.39 (13), p.2765-2768 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Optical thin films of three rod-like polymers, a rigid-rod polymer poly(p-phenylene benzobisthiazole) (PBZT), a diadamantane-substituted PBZT (DMT-PBZT) and a bicyclo[2.2.2]octane-substituted PBZT (BCO-PBZT), at different thicknesses were prepared with the solid-state coagulation process. In contrast to PBZT, DMT-PBZT and BCO-PBZT do not have a π-conjugated backbone because of their aliphatic DMT and BCO moieties. The PBZT thin films showed an out-of-plane optical attenuation coefficient (αo) of 1300 dB cm−1 at 600 nm wavelength while the αo value of the DMT-PBZT and the BCO-PBZT thin films at 600 nm wavelength could not be determined due to their weak absorption in the visible light region. However, the in-plane optical attenuation coefficient (αi) of the BCO-PBZT thin films was determined to be about 11.4 dB cm−1 by waveguide measurement at 632 nm. By comparing the optical transmission of the PBZT thin films to that of the DMT-PBZT and the BCO-PBZT thin films, it is concluded that the optical loss in the PBZT thin films is mainly due to intrinsic absorption of the polymer. |
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ISSN: | 0032-3861 1873-2291 |
DOI: | 10.1016/S0032-3861(97)00532-6 |