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Optics Letters

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  • Vol. 24, Iss. 21 — Nov. 1, 1999
  • pp: 1481–1483

Polymer relaxations determined by use of a temporally and thermally stable interferometer

F. Ghebremichael and R. J. Knize  »View Author Affiliations


Optics Letters, Vol. 24, Issue 21, pp. 1481-1483 (1999)
http://dx.doi.org/10.1364/OL.24.001481


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Abstract

We describe a phase-controlled, highly stable interferometer that is ideal for use in long-time and high-temperature studies. We recorded output intensity variations of <0.2% for over 6 h at temperatures up to 150°C. The setup was used to study in situ the temperature and frequency characteristics of a thin polymer film composed of 4-dimethylamino-4′-nitrostilbene doped into poly(methyl methacrylate). The mobility of the dopant molecules, which governed the electro-optic property of the film, was used to probe the dye-doped polymer’s rheology. We demonstrate one application of the interferometer in probing both the α and the β relaxations of the polymer.

© 1999 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(310.3840) Thin films : Materials and process characterization
(310.6860) Thin films : Thin films, optical properties

Citation
F. Ghebremichael and R. J. Knize, "Polymer relaxations determined by use of a temporally and thermally stable interferometer," Opt. Lett. 24, 1481-1483 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-21-1481


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References

  1. F. Ghebremichael, M. G. Kuzyk, and H. S. Lackritz, Prog. Polym. Sci. 22, 1147 (1997).
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