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Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters

Orientation birefringence and its wavelength dispersion are studied for hot-drawn films of cellulose esters such as cellulose triacetate (CTA), cellulose diacetate (CDA), cellulose acetate propionate (CAP), and cellulose acetate butyrate (CAB). The orientation birefringence of the cellulose esters...

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Main Author: Abd Manaf, Mohd Edeerozey
Format: Article
Language:English
Published: American Chemical Society(ACS) Journal Publishing 2009
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utem.edu.my/id/eprint/7067/1/Macromolecules_42.pdf
http://eprints.utem.edu.my/id/eprint/7067/
http://pubs.acs.org/journal/mamobx
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spelling my.utem.eprints.70672022-02-14T13:32:25Z http://eprints.utem.edu.my/id/eprint/7067/ Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters Abd Manaf, Mohd Edeerozey TJ Mechanical engineering and machinery Orientation birefringence and its wavelength dispersion are studied for hot-drawn films of cellulose esters such as cellulose triacetate (CTA), cellulose diacetate (CDA), cellulose acetate propionate (CAP), and cellulose acetate butyrate (CAB). The orientation birefringence of the cellulose esters is not proportional to the orientation function, indicating that the stress-optical law is not applicable for the cellulose esters. Furthermore, CTA shows negative birefringence, and the magnitude of the absolute value decreases with increasing the wavelength. On the contrary, CAP, CAB, and CDA show positive orientation birefringence that increases with the wavelength. The extraordinary wavelength dispersion of the orientation birefringence for CAP, CAB, and CDA is attributed to the difference in polarizability anisotropy of ester groups. Furthermore, the wavelength dependence of the orientation birefringence for CAP is dependent on the draw ratio and draw temperature, demonstrating that the contribution of polarizability anisotropy from each ester group to the orientation birefringence varies with the draw ratio and temperature. Moreover, the molecular weight and film-processing method also affect the orientation birefringence. American Chemical Society(ACS) Journal Publishing 2009 Article PeerReviewed application/pdf en http://eprints.utem.edu.my/id/eprint/7067/1/Macromolecules_42.pdf Abd Manaf, Mohd Edeerozey (2009) Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters. Macromolecules, 42. pp. 9034-9040. ISSN 0024-9297 http://pubs.acs.org/journal/mamobx
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Abd Manaf, Mohd Edeerozey
Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters
description Orientation birefringence and its wavelength dispersion are studied for hot-drawn films of cellulose esters such as cellulose triacetate (CTA), cellulose diacetate (CDA), cellulose acetate propionate (CAP), and cellulose acetate butyrate (CAB). The orientation birefringence of the cellulose esters is not proportional to the orientation function, indicating that the stress-optical law is not applicable for the cellulose esters. Furthermore, CTA shows negative birefringence, and the magnitude of the absolute value decreases with increasing the wavelength. On the contrary, CAP, CAB, and CDA show positive orientation birefringence that increases with the wavelength. The extraordinary wavelength dispersion of the orientation birefringence for CAP, CAB, and CDA is attributed to the difference in polarizability anisotropy of ester groups. Furthermore, the wavelength dependence of the orientation birefringence for CAP is dependent on the draw ratio and draw temperature, demonstrating that the contribution of polarizability anisotropy from each ester group to the orientation birefringence varies with the draw ratio and temperature. Moreover, the molecular weight and film-processing method also affect the orientation birefringence.
format Article
author Abd Manaf, Mohd Edeerozey
author_facet Abd Manaf, Mohd Edeerozey
author_sort Abd Manaf, Mohd Edeerozey
title Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters
title_short Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters
title_full Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters
title_fullStr Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters
title_full_unstemmed Extraordinary Wavelength Dispersion of Orientation Birefringence for Cellulose Esters
title_sort extraordinary wavelength dispersion of orientation birefringence for cellulose esters
publisher American Chemical Society(ACS) Journal Publishing
publishDate 2009
url http://eprints.utem.edu.my/id/eprint/7067/1/Macromolecules_42.pdf
http://eprints.utem.edu.my/id/eprint/7067/
http://pubs.acs.org/journal/mamobx
_version_ 1725976108200886272
score 13.211869

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