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  • Chemistry  (26)
  • Atomic, Molecular and Optical Physics  (1)
  • Electronic structure and strongly correlated systems
  • Computer Systems
  • 1980-1984  (27)
Collection
Keywords
Publisher
Years
Year
  • 1
    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
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical modification of polystyrene, III. Electrophilic substitution of polystyrene with aromatic anhydrides (1983)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 113 (1983), S. 11-19 
    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: Polystyrol wurde durch Friedel-Crafts-Acylierung mit Trimellithsäureanhydrid in Gegenwart von wasserfreiem Aluminiumchlorid als Katalysator chemisch modifiziert. Das Produkt wurde hinsichtlich seiner Struktur und physikalisch-chemischen Eigenschaften durch Messung der Gesamtkapazität, der thermischen Stabilität und des Titrationsverhaltens charakterisiert. Die thermischen Kenngrößen des mit Trimellithsäureanhydrid modifizierten Polystyrols wurden im Hinblick auf ihre strukturellen Eigenheiten mit denen des mit Phthalsäureanhydrid und mit Pyromellithsäuredianhydrid modifizierten Polystyrols verglichen.
    Notes: Polystyrene has been chemically modified by Friedel-Crafts acylation reaction with trimellitic anhydride in the presence of anhydrous aluminium chloride as catalyst. The product has been characterized in respect of its structure and physicochemical properties by measuring its total capacity, thermal stability and the behaviour to pH metric titration. The thermal characteristics of the trimellitic anhydride modified polystyrene have been compared with the same for phthalic anhydride and pyromellitic dianhydride modified polystyrene in the light of their structural characteristics.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1983.051130102
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  • 3
    Electronic Resource
    Electronic Resource
    Conformational analysis of some mannose-containing and milk oligosaccharides: Correlation of their shape with inhibitory properties in antigen/antibody interactions (1981)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 20 (1981), S. 99-121 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Possible conformations of two mannotetraoses and several milk oligosaccharides have been studied by an energy minimization procedure using semi-empirical potential functions. Changes in the terminal residue at the reducing end (cyclic to acyclic form) of these molecules do not affect the favored conformations of the remaining oligosaccharide moiety. However, differences in the overall shape of the native and reduced forms of the mannotetraose, mannose α(1-3) mannose α(1-2) mannose α(1-2) mannose are much less marked than between the native and reduced forms of lacto-N-tetraose. These differences are related to the effectiveness of the native forms as inhibitors of antibodies produced using synthetic antigens. Changes in the linkage of the residues at the nonreducing end of these molecules affect significantly the overall shape of these molecules. These differences also are related to their effectiveness as inhibitors. In the fucose-containing milk oligosaccharides the additional fucose residues only restrict the orientation of the backbone tetrasaccharide and do not push it into a totally new conformation. The fucose residues come on a surface of the molecule which is away from the region which may be important for binding. The present studies show that it is the overall shape of the molecule which is important in determining its inhibitory properties and give information as to how best to use the immune method for identification of unknown oligosaccharide sequences by specially prepared antibodies.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560200111
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  • 4
    Electronic Resource
    Electronic Resource
    Rotating element model for low density polyethylene (1984)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 5 (1984), S. 441-446 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1984.030050804
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  • 5
    Electronic Resource
    Electronic Resource
    Composite model for the mechanical and optical properties of a semicrystalline polymer, polyoxymethylene (1984)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 5 (1984), S. 295-299 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1984.030050509
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  • 6
    Electronic Resource
    Electronic Resource
    Chemical modification of poly(N-vinylcarbazole). II. Some properties of poly(N-vinylcarbazole-3,6-diphthalimide) (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 20 (1982), S. 333-339 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.130200608
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  • 7
    Electronic Resource
    Electronic Resource
    Chemical modification of poly(N-vinylcarbazole): Synthesis of poly(N-vinylcarbazole-3,6-diphthalimide) of improved thermal stability (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 19 (1981), S. 235-238 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.130190503
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  • 8
    Electronic Resource
    Electronic Resource
    Phthalic anhydride-based cation exchange resin from N-vinylcarbazole (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 511-518 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A condensation product based on phthalic anhydride and N-vinylcarbazole has been prepared and processed into a sulfonic acid cation exchange resin. The resin produced has been characterized by measuring its total and salt splitting capacities and by studying its thermal characteristics, rate of exchange, and behavior to pH metric titration.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1980.070250316
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  • 9
    Electronic Resource
    Electronic Resource
    Cation exchange resin from sulfonated N-vinylcarbazole and divinylbenzene copolymer (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 1719-1725 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A copolymer of N-vinylcarbazole and divinylbenzene has been sulfonated to yield a cation exchange resin of improved thermal properties compared to other vinylcarbazole-based resins. The resin has been characterized by measuring its total and salt-spliting capacities, pH metric titration, and thermal stability characteristics.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070260526
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  • 10
    Electronic Resource
    Electronic Resource
    Furfural-based phosphonic acid cation exchange resins from N-vinylcarbazole and its polymer. II (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 27 (1982), S. 161-169 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Thermal stabilities of the crosslinked N-vinylcarbazole/poly(N-vinylcarbazole)-furfural polymers and of the phosphonic acid resins prepared thereform were studied by thermogravimetric analysis. The overall thermal stability of the crosslinked polymers is greater than the same for poly(N-vinylcarbazole) and is further improved upon phosphorylation. The resins are stable in 5N acids and water at 100°C. Isothermal oxidative degradation studies of the resins indicate significant increase in the capacities. pH metric titration of the resins shows the presence of mono and dibasic phosphonic acid groups. The resins realize about 90% of their capacities within 2 min of equilibration.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1982.070270118
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