1995
DOI: 10.1021/bk-1994-0579.ch018
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Uniaxial and In-Plane Molecular Orientation of Polyimides and Their Precursor as Studied by Absorption Dichroism of Perylenebisimide Dye

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Cited by 2 publications
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“…The incidence angle was adjusted on die basis of the refractive indices. (6)(7)(8) We defined/= (l-D)/(l-£>0) as an in-plane orientation parameter, where the dichroic ratio D is the absorbance ratio [at peak wavelength (ca. 535 nm) of PEDI] of the linearly polarized lights parallel (Ppolarized light) and perpendicular (5-polarized light) to the incidence plane, i.e., (Aρ /Ash and Do (= cos 2 a) is the dichroic ratio for complete in-plane orientation (two-dimensionally random).…”
Section: Physical Properties Affected By In-plane Molecular Orientatimentioning
confidence: 99%
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“…The incidence angle was adjusted on die basis of the refractive indices. (6)(7)(8) We defined/= (l-D)/(l-£>0) as an in-plane orientation parameter, where the dichroic ratio D is the absorbance ratio [at peak wavelength (ca. 535 nm) of PEDI] of the linearly polarized lights parallel (Ppolarized light) and perpendicular (5-polarized light) to the incidence plane, i.e., (Aρ /Ash and Do (= cos 2 a) is the dichroic ratio for complete in-plane orientation (two-dimensionally random).…”
Section: Physical Properties Affected By In-plane Molecular Orientatimentioning
confidence: 99%
“…The detailed procedure is described in ref. [6][7][8]. Film density was measured using a density gradient column composed of xylene-CCU mixtures.…”
mentioning
confidence: 99%