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  • 1
    Digitale Medien
    Digitale Medien
    Synthesis and electrical conductivity of polymers containing trans-1,2-bis(9-carbazolyl)cyclobutane units (1987)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 25 (1987), S. 1463-1474 
    Details
    ISSN: 0887-624X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Novel poly-Schiff bases (PSB's) that contain trans-1,2-bis(9-carbazolyl)cyclobutane(DCZB) units were synthesized by the direct polycondensation of trans-1,2-bis(3-formyl-9-carbazolyl)cyclobutane with aromatic diamines in n-amyl alcohol at 160°C. Complexation of these PSB's and of poly(vinyl DCZB) (PVDCZB) with iodine produced cation-radical salts which resulted form the transfer of an electron from DCZB moieties to iodine. All the undoped polymers were insulators having electrical conductivity of the order of 10-10-10-12 S cm-1 depending on the structure of polymers. By doping with iodine, the electrical conductivity increased by several orders of magnitude and reached a value of 10-3 S cm-1 in the case of PVDCZB and 10-5-10-6 S cm-1 in the case of PSB's. The electrical conductivity of doped PSB's increased with decreasing diamine length. PVDCZB having the same iodine content per carbazole unit as poly(9-vinyl-carbazole) (PVK) has a greater electrical conductivity than PVK.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1987.080250602
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  • 2
    Digitale Medien
    Digitale Medien
    Novel polybenzoxazinones with tricyclic fused-rings (1986)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 24 (1986), S. 2553-2563 
    Details
    ISSN: 0887-624X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A series of polybenzoxazinones containing phenoxathiin and phenoxaphosphine units were prepared from tricyclic diacid chlorides and 4,4′-diaminobiphenyl-3,3′-dicarboxylic acid and 4,4′-diamino-3,3′-diphenylmethane dicarboxylic acid. The low temperature solution polymerization technique afforded polyamic acid which subsequently underwent cyclization along the polymer chain in a solvent mixture of refluxing N,N′-dimethylacetamide, acetic anhydride, and pyridine to give polybenzoxazinones in moderate yields. The polymers thus obtained had inherent viscosities in the range of 0.15-0.23 dL/g, were sparingly soluble in N-methyl-2-pyrrolidone, and were found to be thermally more stable than the corresponding open-chain polymer with diphenylether linkage.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1986.080241013
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  • 3
    Digitale Medien
    Digitale Medien
    Synthesis and characterization of polyimides containing heterocyclic units (1988)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 26 (1988), S. 1553-1560 
    Details
    ISSN: 0887-624X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Five new polyimides containing phenoxaphosphine as well as dibenzothiophene, phenoxathiin, and thianthrene units have been synthesized from 10-phenylphenoxaphosphine-2,3,7,8-tetracarboxylic dianhydride-10-oxide and heterocyclic diamines by the cyclopolycondensation method. These polyimides had inherent viscosities in the 0.75-1.10 dL/g range in conc. H2SO4 at 30°C. All the polymers were characterized by elemental analysis, density, solubility, crystallinity, IR spectra, and thermal methods.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1988.080260606
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  • 4
    Digitale Medien
    Digitale Medien
    Synthesis of new polyamides having in-chain trans-1,2-dicarbazolylcyclobutane units and their spectroscopic properties (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 1147-1155 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: New polyamides having in-chain trans-1,2-dicarbazolylcyclobutane (DCZB) units were prepared. Fluorescence studies have shown that the fluorescence quantum yields of these polyamides are rather low in comparison with those of DCZB alone and vinyl polymers containing the DCZB units. Furthermore, time-resolved measurements have revealed that the fluorescence decay of these polyamides can, in general, be analyzed by a triple exponential decay with life times of 1-2 ns (≈20%), 5-6 ns (≈35%), and 12-14 ns (≈45%).
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1987.021880517
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  • 5
    Digitale Medien
    Digitale Medien
    Synthesis and properties of polyamine-imides containing phenoxaphosphine units (1987)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 153 (1987), S. 95-111 
    Details
    ISSN: 0003-3146
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Beschreibung / Inhaltsverzeichnis: Polyaminimide wurden durch Polykondensation von Bis-N-methylolimiden und Diaminen hergestellt. Die Reaktionen wurden in dem aprotischen Lösungsmittel Dimethylacetamid (DMAc) durchgeführt, wodurch Polymere mit inherenten Viskositäten von 0,36-0,75 dl/g erhalten wurden. Die Polymeren wurden mit konz. H2SO4 abgebaut. Alle Polymere wurden durch Elementaranalyse, IR- und 1H-NMR-Spektroskopie, Dichte, Löslichkeit, Kristallinität und durch Thermoanalyse charakterisiert.
    Notizen: Polyamine-imides were synthesized by polycondensation reaction of bis-N-methyl-olimides and diamines. The reactions were carried out in the aprotic polar solvent dimethylacetamide (DMAc) and polymers with inherent viscosities ranging between 0.36-0.75 dl/g were obtained. The polymers were degraded by conc. H2SO4. All the polymers were characterized by elemental analysis, IR- and 1H-NMR spectroscopy, density, solubility, crystallinity, and thermal analysis.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/apmc.1987.051530107
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  • 6
    Digitale Medien
    Digitale Medien
    Preparation and properties of polyamides containing heterocyclic units (1986)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 7 (1986), S. 743-746 
    Details
    ISSN: 0173-2803
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Zusätzliches Material: 2 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/marc.1986.030071111
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