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Erschienen in: Rheologica Acta 9/2008

01.12.2008 | Original Contribution

Photoviscoelastic behavior and residual thermal birefringence in optical-grade polycarbonates

verfasst von: Tsui-Hsun Lin, Avraam I. Isayev

Erschienen in: Rheologica Acta | Ausgabe 9/2008

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Abstract

The stress-optical coefficient functions of two optical-grade polycarbonates (PCs) have been obtained by simultaneous measurements of the relaxation modulus and strain-optical coefficient functions. Nonlinear behavior of the relaxation modulus and strain-optical coefficient was observed at small strains at room temperature. Comparison of these functions in the linear region with those of a commercial grade PC was made. These functions have been incorporated to linear viscoelastic and photoviscoelastic constitutive equations to calculate residual thermal birefringence in freely quenched PC plates. The numerical results have been compared with the measurements indicating a fair agreement between them.

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Metadaten
Titel
Photoviscoelastic behavior and residual thermal birefringence in optical-grade polycarbonates
verfasst von
Tsui-Hsun Lin
Avraam I. Isayev
Publikationsdatum
01.12.2008
Verlag
Springer-Verlag
Erschienen in
Rheologica Acta / Ausgabe 9/2008
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI
https://doi.org/10.1007/s00397-008-0290-3

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