Kerr Effect and Wide Angle Light-Scattering Studies of a Para-Aromatic Polyamide in Dilute Solution
Year: 1996
Type: article
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.
Source: Macromolecules
DOI: 10.1021/ma951777t
Authors: A. J. Shere, M. Sethumadhavan, R. S. Stein, R. F. Saraf, R. A. Gaudiana, P. Mehta, T. Adams
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2007955621