Kerr effect and wide angle light-scattering studies of a para-aromatic polyamide in dilute solution

A. J. Shere; M. Sethumadhavan; R. S. Stein; R. F. Saraf; R. A. Gaudiana; P. Mehta; T. Adams

doi:10.1021/ma951777t

Kerr effect and wide angle light-scattering studies of a para-aromatic polyamide in dilute solution

A. J. Shere, M. Sethumadhavan, R. S. Stein, R. F. Saraf, R. A. Gaudiana, P. Mehta, T. Adams

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6 Scopus citations

Abstract

The geometric and optical properties of a para-aromatic polyamide are characterized using wide angle light scattering and electric birefringence. The polydispersity correction was applied theoretically by assuming the most probable distribution. The aromatic polyamide studied can be satisfactorily modeled as a Kratky-Porod wormlike chain with a presistence length of 220 ± 50 Å and an optical unit anisotropy ratio of 2.2 ± 0.3 in tetrahydrofuran. The refractive index of 1.67 ± 0.03 is comparable to that of similar polyamides. The high persistence length of the polymer chain and the high inherent optical anisotropy of the repeat unit are found to be responsible for the exceptionally high birefringence observed in the oriented films. It is also conclusively established that there is no aggregation in the absence of moisture.

Original language	English (US)
Pages (from-to)	2088-2094
Number of pages	7
Journal	Macromolecules
Volume	29
Issue number	6
DOIs	https://doi.org/10.1021/ma951777t
State	Published - Mar 11 1996
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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title = "Kerr effect and wide angle light-scattering studies of a para-aromatic polyamide in dilute solution",

abstract = "The geometric and optical properties of a para-aromatic polyamide are characterized using wide angle light scattering and electric birefringence. The polydispersity correction was applied theoretically by assuming the most probable distribution. The aromatic polyamide studied can be satisfactorily modeled as a Kratky-Porod wormlike chain with a presistence length of 220 ± 50 {\AA} and an optical unit anisotropy ratio of 2.2 ± 0.3 in tetrahydrofuran. The refractive index of 1.67 ± 0.03 is comparable to that of similar polyamides. The high persistence length of the polymer chain and the high inherent optical anisotropy of the repeat unit are found to be responsible for the exceptionally high birefringence observed in the oriented films. It is also conclusively established that there is no aggregation in the absence of moisture.",

author = "Shere, {A. J.} and M. Sethumadhavan and Stein, {R. S.} and Saraf, {R. F.} and Gaudiana, {R. A.} and P. Mehta and T. Adams",

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T1 - Kerr effect and wide angle light-scattering studies of a para-aromatic polyamide in dilute solution

AU - Shere, A. J.

AU - Sethumadhavan, M.

AU - Stein, R. S.

AU - Saraf, R. F.

AU - Gaudiana, R. A.

AU - Mehta, P.

AU - Adams, T.

PY - 1996/3/11

Y1 - 1996/3/11

N2 - The geometric and optical properties of a para-aromatic polyamide are characterized using wide angle light scattering and electric birefringence. The polydispersity correction was applied theoretically by assuming the most probable distribution. The aromatic polyamide studied can be satisfactorily modeled as a Kratky-Porod wormlike chain with a presistence length of 220 ± 50 Å and an optical unit anisotropy ratio of 2.2 ± 0.3 in tetrahydrofuran. The refractive index of 1.67 ± 0.03 is comparable to that of similar polyamides. The high persistence length of the polymer chain and the high inherent optical anisotropy of the repeat unit are found to be responsible for the exceptionally high birefringence observed in the oriented films. It is also conclusively established that there is no aggregation in the absence of moisture.

AB - The geometric and optical properties of a para-aromatic polyamide are characterized using wide angle light scattering and electric birefringence. The polydispersity correction was applied theoretically by assuming the most probable distribution. The aromatic polyamide studied can be satisfactorily modeled as a Kratky-Porod wormlike chain with a presistence length of 220 ± 50 Å and an optical unit anisotropy ratio of 2.2 ± 0.3 in tetrahydrofuran. The refractive index of 1.67 ± 0.03 is comparable to that of similar polyamides. The high persistence length of the polymer chain and the high inherent optical anisotropy of the repeat unit are found to be responsible for the exceptionally high birefringence observed in the oriented films. It is also conclusively established that there is no aggregation in the absence of moisture.

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Kerr effect and wide angle light-scattering studies of a para-aromatic polyamide in dilute solution

Abstract

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