Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Solubility characteristics of poly(N-vinylcarbazole) prepared by Co(II) loaded 13X molecular sieve (1986)
    Springer
    Polymer bulletin 16 (1986), S. 473-477 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract During the polymerization of N-vinylcarbazole (NVC) by Co(II)-13X the resultant polymer (¯Mn=6000) is soluble in benzene or toluene but partly soluble in methylethyl ketone (MEK). To ascertain whether the MEK insolubility is due to polymer tacticity, the polymer has been further characterized by13C NMR analysis. The atactic structure of polyN-vinylcarbazole (PNVC) initiated by Co(II) has been established from a comparison of methine carbon ( ) peaks with the same for a cationic PNVC(BF3/Et2O, isotactic) and radical PNVC (AIBN, atactic).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955581
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Cation exchange resins from chemically modified poly(vinyl chloride) (1987)
    Springer
    Polymer bulletin 17 (1987), S. 361-368 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Poly(vinyl chloride) has been modified chemically to a cation exchange resin by halogen displacement reactions with phenol sulfonic acid, bisphenol-A sulfonic acid and phenolpthalein sulfonic acid. Ion-exchange capacity, salt-splitting capacity and pH-titration characteristics of these resins have been evaluated. pH-titration behaviour of these resins is consistent with that of a polyfunctional cation-exchanger having pK1=2 and pK2=9–10 corresponding to -SO3H and phenolic-OH groups respectively. The ion-exchange capacity values are comparable in magnitude to those of polystyrene based commercial cation-exchangers such as Amberlite IR-120 and Dowex-50.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955721
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Erratum (1987)
    Springer
    Polymer bulletin 18 (1987), S. 472-472 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275604
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Polymer anchored metal complexes (1991)
    Springer
    Polymer bulletin 26 (1991), S. 145-150 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Pyromellitic dianhydride and dipyridyl/dipyridylamine have been polycondensed in presence of anhydrous ZnCl2 under selective conditions. Fe(III), Cr(III), Co(II), Ni(II) and Cu(II) complexes of the polycondensates have been prepared. Tentative structures for PMDA-DP (DPA)-M complexes have been proposed on the basis of elemental IR and electronic spectral analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297518
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Benzene and anthraquinone sulfone derivatives of poly(N-vinylcarbazole) (1988)
    Springer
    Polymer bulletin 20 (1988), S. 323-328 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Benzene and anthraquinonesulfonyl chlorides were reacted with poly-N-vinylcarbazole in presence of Friedel-Crafts catalyst to form the corresponding sulfonyl derivatives. The sulfonated poly-N-vinylcarbazoles were characterized by elemental analyses, IR spectroscopy, thermogravimetric analysis and evaluation of permittivity and loss-tangent behaviour with varying applied frequencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255731
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Thermal stability, dielectric and conductivity characteristics of 9,10-anthracene-diol-anhydride polycondensates (1990)
    Springer
    Polymer bulletin 24 (1990), S. 565-572 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Four polycondensates have been prepared from 9,10-anthracene-diol and succinic anhydride, phthalic anhydride, pyromellitic dianhydride and 1,4,5,8-naphthalene tetracarboxylic dianhydride. Thermal stabilities, dielectric and conductivity characteristics of these condensates indicate that these properties are influenced by the nature of the anhydride moiety.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395581
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Polymer anchored metal complexes (1991)
    Springer
    Polymer bulletin 26 (1991), S. 151-157 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Thermal stabilities of these polymers are influenced by the nature of the 3d-metal and their initial decomposition temperatures are between 230–290°C in general. The dielectric constant values are essentially independent of the applied frequency and at 104 KHz reveal the trend: $$PMDA\mathop { - DP - }\limits_{(9.2)} Cr\left. {(III)} \right\rangle {\text{ PM}}\mathop {{\text{DA - D}}}\limits_{{\text{(8}}{\text{.7)}}} {\text{P - Fe}}\left. {{\text{(III)}}} \right\rangle {\text{ PM}}\mathop {{\text{DA - D}}}\limits_{{\text{(8}}{\text{.1)}}} {\text{P - Cu}}\left. {{\text{(II)}}} \right\rangle {\text{ P}}\mathop {{\text{MDA}}}\limits_{{\text{(8}}{\text{.0)}}} {\text{ - DP}}$$ Values for dielectric loss (tan δ) for these polymers are low (1–4×10-2 at 10 KHz) and unlike the dielectric constant, are strongly dependent on the applied frequency. The d.c.-conductivities of the polymers are in the range 4.5×10-8 – 4.7×10-10 (ohm-cm)-1 and depend on the metal ions: $$\left. {Fe^{3 + } } \right\rangle \left. {Cr^{3 + } } \right\rangle \left. {Ni^{2 + } } \right\rangle Cu^{2 + } $$
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00297519
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    A cation exchange resin from poly(N-vinyl carbazole) (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 72 (1978), S. 57-66 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Poly(N-vinylcarbazol) wurde mit verschiedenen Reagenzien sulfoniert und die Ionenaustauschkapazität der erhaltenen Harze bestimmt. Eine maximale Kapazität von 4,5 meq · g-1 des trockenen Harzes wurde durch 10stündige Reaktion mit 98,8proz. H2SO4 bei 30°C erhalten. Die pH-Titrationskurven lassen einen starken monofunktionellen Kationenaustauscher mit einem pK-Wert von 2,2 erkennen. Das Harz zeigt eine mäßige Austauschgeschwindigkeit mit NaCl und ist bis zu 250°C thermisch stabil.
    Notes: Poly(N-vinyl carbazole) was sulfonated with different sulfonating agents and ion exchange capacities of the resins produced were evaluated. A maximum capacity of 4.5 meq · g-1 of dry resin was realized when sulfonation was done with 98.8% H2SO4 at 30°C for 10 h. The pH titration curves reveal the nature of a strong monofunctional cation exchanger with a pK value of 2.2. The resin exhibits a moderate rate of exchange with NaCl and is thermally stable up to ca. 250°C.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050720105
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    A cation exchange resin based on the condensation product of poly(iso-butyl vinyl ether) and furfural (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 73 (1978), S. 53-61 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Ein Kationenaustauscher wurde durch Kondensation von Polyisobutylvinyläther und Furfural hergestellt. Als Katalysator diente konzentrierte Schwefelsäure. Der Austauscher wurde durch Messen der Austauschkapazität, durch Untersuchen seiner thermischen Belastbarkeit und durch Bestimmen seines Verhaltens bei der pH-Titration charakterisiert. Es scheint sich um einen Austauscher mit schwachen Säregruppen zu handlen, die wohl als —COOH-Gruppen vorliegen und durch Oxidation aus den Furfuralgruppen entstanden sein dürften.
    Notes: A cation exchange resin was synthesized from the condensation product of poly(iso-butyl vinyl ether) and furfural by treating it with concentration sulphuric acid. The resin produced was characterized by measuring its total and salt splitting capacities, and by studying its thermal characteristics and behaviour to pH metric titration. The latter suggests the resin to be a weak one possibly containing —COOH groups, which result from the oxidation of the furfural aldehyde group by sulphuric acid.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050730104
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Studies on carbazole based polyarylates (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 97 (1981), S. 79-90 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde ein neues Polyarylat aus Carbazol und Resorcinol nach der Methode der Lösungskondensation bei niedriger Temperatur unter Verwendung von Pyridin als Katalysator hergestellt. Das Polymere wurde im Hinblick auf seine Struktur, thermische Stabilität und sein dielektrisches Verhalten charakterisiert. Der Einfluß des Diphenolenteils auf die thermischen und dielektrischen Eigenschaften dieses Polyarylats und anderer auf Carbazolbasis wurde untersucht.
    Notes: A novel polyarylate has been synthesized from carbazole and resorcinol by low temperature solution condensation method using as an acceptor-catalytic reagent pyridine. It has been characterized in respect of its structure, thermal stability and dielectric behaviour. The influence of the diphenol moiety on the thermal and the dielectric properties of this polyarylate and the others based on carbazole has been studied.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050970107
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...