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Conductivity anisotropy in oriented poly(p-Phenylene vinylene) (1984)

Gagnon, David R. ; Capistran, James D. ; Karasz, Frank E. ; [weitere]

Springer

Polymer bulletin 12 (1984), S. 293-298

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ISSN: 1436-2449

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Summary The study of charge transport mechanisms in highly conjugated conducting polymers has historically been hampered by the complex and invariant morphologies of the best conductors. We have prepared amorphous and uniaxially oriented films of poly(p-phenylene vinylene) (PPV) which exhibit a large conductivity anisotropy proportional to the degree of molecular orientation. The conductivity of the AsF5 doped PPV, together with wide angle x-ray and IR characterization of these samples is reported.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00263141

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Digitale Medien

Polymer surface reconstruction by diffusion of organic functional groups from and to the surface (1984)

Gagnon, David R. ; McCarthy, Thomas J.

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 29 (1984), S. 4335-4340

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ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Three nonpolar organic polymers containing small amounts of polar functionality were studied with regard to their surface characteristics. Two of the materials, potassium chlorate/sulfuric acid-oxidized polyethylene and poly(ethylene-co-acrylic acid) display variable surface polarities which can be reversibly accessed by heating films of the polymers in air or aqueous sodium hydroxide. Sodium-reduced Teflon-FEP did not exhibit this characteristic. A combination of contact angle, ESCA, and ATR IR data are used to display that the surface changes are caused by migration of functional groups within the outer few tens of angstroms of the surface.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1984.070291262

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Structure investigation of poly(p-phenylene vinylene) (1986)

Granier, Thierry ; Thomas, Edwin L. ; Gagnon, David R. ; [weitere]

Bognor Regis [u.a.] : Wiley-Blackwell

Journal of Polymer Science Part B: Polymer Physics 24 (1986), S. 2793-2804

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ISSN: 0887-6266

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Notizen: Electron diffraction patterns of highly oriented poly(p-phenylene vinylene) films obtained by the soluble polymeric precursor route are interpreted on the basis of a monoclinic unit cell containing two monomer units: c (chain axis) = 0.658 nm, a = 0.790 nm, b = 0.605 nm, α ≃ 123°. The molecules are nearly perfectly oriented along the stretching direction but exhibit partial axial translational disorder.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/polb.1986.090241214

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