Výsledky vyhledávání - "M. E. Jozefowicz"

Time dynamics of growth and decay of photoinduced defects in poluanilines

Autor: A. J. Epstein, M. E. Jozefowicz, Alan G. MacDiarmid

Publikováno v: Synthetic Metals. 59:123-139

Polyanilines differ from other electronic polymers in the presence of very long-lived photoinduced absorptions, attributed to pinning of ring-rotational polarons of large effective mass. We report the growth and decay kinetics of long-lived photoindu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65c1681459c02ce3c54815d81ce9f246
https://doi.org/10.1016/0379-6779(93)91021-s

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Structural aspects of the polyaniline family of electronic polymers

Autor: Alan G. MacDiarmid, Jean-Paul Pouget, Arthur J. Epstein, E. M. Scherr, M. E. Jozefowicz, M. Laridjani

Publikováno v: Synthetic Metals. 51:95-101

Recent structural studies of the polyaniline family of electronic polymers in the base and salt forms are reviewed. We describe the crystalline and amorphous structures of the two classes of emeraldine. The structural evolution with HC1 doping and ri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be51e37a0f4766412c22b104d25dbe4e
https://doi.org/10.1016/0379-6779(92)90258-k

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Amorphography - the relationship between amorphous and crystalline order. 1. The structural origin of memory effects in polyaniline

Autor: A. J. Epstein, A. G. Macdiarmid, M. Laridjani, Jean-Paul Pouget, E. M. Scherr, M. E. Jozefowicz

Publikováno v: Macromolecules. 25:4106-4113

Many materials, especially polymers, have a substantial volume fraction without crystalline order. Though these regions are often termed amorphous, they frequently have specific local order. We describe and use here a method based on a non-energy-dis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87f516cef7e2f88ace1dbb9f2ccedbb1
https://doi.org/10.1021/ma00042a010

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Protonic acid doping of two classes of the emeraldine form of polyaniline

Autor: M. E. Jozefowicz, X. Tang, A. J. Epstein

Publikováno v: Synthetic Metals. 46:337-340

We compare the HCl doping data for the two recently discovered classes of polyaniline. The EB-II-ES-II system was found to be more difficult to dope in the pH range 2–3 than the previously studied EB-I-ES-I system. We discuss the influence of the c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b72643e172c6d9f3faa75bd6900d8c71
https://doi.org/10.1016/0379-6779(92)90359-q

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X-ray structure of the polyaniline derivative poly(o-toluidine): the structural origin of charge localization

Autor: M. E. Jozefowicz, Jean-Paul Pouget, A. J. Epstein, Anjan Ray, A. G. Macdiarmid, J.G. Masters

Publikováno v: Macromolecules. 24:5863-5866

We investigated the structural features of the polyaniline derivative-poly-ortho-toluidine (POT). In the base form POT is amorphous, with an x-ray diffraction pattern similar to that of emeraldine base EB-I. We estimate from the position of the broad

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::25245176071e137e92290920466a4b83
https://doi.org/10.1021/ma00021a022

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Thermal process for orientation of polyaniline films

Autor: M. E. Jozefowicz, C. Li, J. M. Ginder, K. Kim, J. M. Leng, R. P. McCall, K.R. Cromack, Arthur J. Epstein, G. Du

Publikováno v: Macromolecules. 24:4157-4161

It is demonstrated that emeraldine base polymer films can be processed to form strong oriented materials by maintaining the polymer under stress while the temperature is raised toward the glass transition temperature. After the orientation process, t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::df7d57942fce785737fbbadbbd664568
https://doi.org/10.1021/ma00014a031

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X-ray structure of polyanilines

Autor: Anjan Ray, J.G. Masters, X. Tang, Y. Sun, Arthur J. Epstein, Alan G. MacDiarmid, Jean-Paul Pouget, M. E. Jozefowicz

Publikováno v: Synthetic Metals. 41:723-726

We describe two classes of the emeraldine form of polyaniline, Class I exhibits ES-I crystal structure in the HCl salt form and in the base form it is amorphous EB-I. Class II materials form partially crystalline structures EB-II and ES-II in base an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::42fce8e27a9c601e345a390bce9d918f
https://doi.org/10.1016/0379-6779(91)91170-f

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