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  • 1
    Electronic Resource
    Electronic Resource
    Polymerization of Aromatic Aldehydes. III. The Cyclopolymerization of Phthaldehyde and the Structure of the Polymer (1969)
    s.l. : American Chemical Society
    Macromolecules 2 (1969), S. 414-419 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60010a018
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  • 2
    Electronic Resource
    Electronic Resource
    Imidazole catalyses in aqueous systems. I. Enzyme-like catalysis in the hydrolysis of a phenyl ester by imidazole-containing copolymers (1969)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 91 (1969), S. 2716-2723 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01038a051
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  • 3
    Electronic Resource
    Electronic Resource
    Notes- Syntheses of N-Vinyl-secondary-amic Acids (1959)
    s.l. : American Chemical Society
    The @journal of organic chemistry 24 (1959), S. 428-429 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01085a612
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on polymers from cyclic dienes. XII. Cationic polymerization of spiro[2,4]hepta-4,6-diene (1973)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 11 (1973), S. 1917-1925 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polymerizations of spiro[2,4]hepta-4,6-diene were carried out with cationic initiators and Ziegler-type catalysts. This monomer polymerized very rapidly with a variety of cationic initiators, and low monomer and initiator concentrations had to be employed in order to avoid formation of crosslinked polymers. The polymer contained 1,2 and 1,4 addition units, and there was no indication of the opening of the cyclopropyl ring in the monomer unit. The following relationship was obtained: [η] = 4.5 × 10-8M̄n1.71. The exponential coefficient of this equation is much greater than those typical of vinyl polymers, suggesting that the polymer chain is very stiff. The polymer showed much enhanced resistance to autoxidation as compared with polycyclopentadiene, and its softening point was above 200°C. These interesting physical and chemical properties of the monomer and the polymer can be associated with their spiro structures.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1973.170110813
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  • 5
    Electronic Resource
    Electronic Resource
    Studies on the polymerization of bifunctional monomers III. Radical polymerization of o-divinylbenzeneContribution No. 45 from the Departement of Organic Synthesis, Faculty of Engineering, Kyushu University. (1963)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 68 (1963), S. 1-11 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Bei der radikalischen Polymerisation von o-Divinylbenzol wurden lösliche Polymere erhalten. Es wurde gefunden, daß der Gehalt an freien Doppelbindungen im Polymeren niedriger war als 1 Doppelbindung pro Grundbaustein. Es wird daraus der Schluß gezogen, daß die intramolekulare Cyklisierungsreaktion während der Polymerisation eintrat. Die Einflüsse der Polymerisationstemperatur und der Monomerkonzentration auf die Cyclisierungsreaktion wurden nach einer kinetisch abgeleiteten Gleichung untersucht.
    Notes: In the radical polymerization of o-divinylbenzene, soluble polymers were obtained. The content of pendant double bond in the polymer was found to be lower than one for one monomer unit. It was concluded that the intramolecular cyclization reaction occurred during the polymerization. The effects of polymerization temperature and monomer concentration on the cyclization reaction were investigated with the aid of an equation derived kinetically.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1963.020680101
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  • 6
    Electronic Resource
    Electronic Resource
    Studies on polymers from cyclic dienes. II. A solvent effect in bromine addition to polycyclopentadienePart I: C. Aso, T. Kunitake, and S. Ushio, Chem. high Polymer [Tokyo] 19 (1962) 734. (1966)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 97 (1966), S. 40-48 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Addition von Brom an Polycyclopentadien wurde in 1,1,2,2-Tetrachloräthan und in THF durchgeführt. Im ersten Lösungsmittel ist die Bromierung quantitativ, wogegen im THF nur 2/3 der Doppelbindungen reagieren. Dieser Unterschied wird auf eine verminderte Reaktivität des Broms im THF zurückgeführt; die experimentellen Ergebnisse stützen die Annahme, daß eine Cyclopentadieneinheit dann nicht mehr reagiert, wenn sie von zwei bereits bromierten Ringen flankiert wird.
    Notes: Bromine addition to polycyclopentadiene was carried out in 1,1,2,2-tetrachloroethane and in THF. In the former solvent, the bromine addition was quantitative, while, in the latter, only 2/3 of the double bonds had reacted. This difference was attributed to the decreased reactivity of bromine in THF; the experimental result agreed with the calculated extent of reaction based on the model that a cyclopentene unit flanked by two already brominated rings becomes unreactive.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1966.020970105
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  • 7
    Electronic Resource
    Electronic Resource
    Studies on the polymerization of bifunctional monomers. X. Further studies on the cationic polymerization of o-divinylbenzene (1966)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 97 (1966), S. 31-39 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es werden neue Ergebnisse über die kationische Cyclopolymerisation von o-Divinylbenzol mitgeteilt. Die Beziehung zwischen der Cyclisierungskonstante (rc) und der Zahl an seitenständigen Doppelbindungen im Polymeren wurde statistisch abgeleitet, und zwar ohne Verwendung des kinetischen Stationaritätsprinzips.Experimentell wurden das Lösungsmittel und der Katalysator variiert. Die Polarität des Lösungsmittels beeinflußt die Größe von rc nur wenig; verschiedene FRIEDEL-CRAFTS-Katalysatoren ergaben dagegen schr unterschiedliche Werte für rc, wobei folgende Rangordnung gefunden wurde: Diese Reihenfolge wird mit der Struktur des wachsenden Ionenpaares in Beziehung gebracht.
    Notes: Cationic cyclopolymerization of o-divinylbenzene was further investigated. The relationship between the cyclization constant (rc) and the amount of pendant double bonds present in polymer was derived statistically, without resort to the kinetic steady state approximation.When the catalyst and the solvent were varied, the influence of the solvent polarity on rc was small. However, different FRIEDEL-CRAFTS catalysts gave widely varied rc values in the following order: This variation was correlated with the structure of the propagation ion-pair.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1966.020970104
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  • 8
    Electronic Resource
    Electronic Resource
    Studies on the polymerization of bifunctional monomers. XI. The cyclic polymerization of divinyl ether and the structure of the polymerContribution No. 98 from the Department of Organic Synthesis, presented at the 14th Annual Meeting of High Polymer Soc. of Japan, Tokyo, May 1965.Part X: C. ASO, T. KUNITAKE, and R. KITA, Makromolekulare Chem. 97 (1966) 31. (1967)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 100 (1967), S. 100-116 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die radikalische Polymerisation des Divinyläthers wurde weiter untersucht. Um die cyclische Struktur des Polydivinyläthers aufzuklären, wurde das Polymere verseift und oxydiert.Während Versuche zur Umwandlung des Polymeren zu Polyvinylacetat negativ verliefen, gelang es, durch Oxydation mit Salpetersäure etwa 1% an Bernsteinsäure zu erhalten. Dies läßt auf Kopf-Kopf-Verknüpfungen im Polymeren schließen. Außerdem wurde durch Telomerisation von Divinyläther in Chloroform ein bicyclisches Telomeres erhalten das aus zwei Molekülen des Monomeren und einem Molekül Chloroform besteht. Wie aus dem IR- und dem NMR-Spektrum hervorgeht, enthält dieses Telomere eine Methylgruppe Aus diesen Ergebnissen wird eine bicyclische Ringe enthaltende Struktur für die Polydivinyläther vorgeschlagen, die durch Polymerisation in Benzol als Lösungsmittel erhalten wurden. Weiterhin wird angenommen, daß dieses bicyclische Ringsystem teilweise Schwanz-Schwanz-Verknüpfung und wenigstens einen fünfgliedrigen Ring besitzt.
    Notes: The radical polymerization of divinyl ether was further studied. In order to clarify the cyclic structure of poly (divinyl ether), the saponification and the oxidation of the polymer were studied.While the conversion of the polymer to poly (vinyl acetate) was tried without sucess, about 1% of succinic acid was obtained by oxidation with nitric acid. This indicates the presence of head-to-head bonds in the polymer. Moreover, a bicyclic telomer composed of two moles of monomer and one mole of chloroform was obtained by the telomerization of divinyl ether in chloroform. The IR- and NMR-spectra indicated the presence of a methyl group in that telomer. From these results, a structure containing bicyclic rings is sugessted for poly (divinyl ether) which was obtained by solution polymerization in benzene. This bicyclic ring is considered to have partly tail-to-tail addition and at least one five-membered ring.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1967.021000112
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  • 9
    Electronic Resource
    Electronic Resource
    Studies on polymers from cyclic dienes. VII.Part VI. Radiation Polymerization of the Thiourea Adduct of Cyclopentadiene. C. Aso, T. KUNITAKE, and Y. ISHIMOTO, Bull. chem. Soc. Japan, 40, No. 12 (1967) in press.. Cationic polymerization of methylcyclopentadieneContribution No. 129, from this department. Presented at the 16th Annual Meeting of the Society of Polymer Science, Japan, Tokyo, May 1967. (1967)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 109 (1967), S. 161-175 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Polymerisation von Methylcyclopentadien wurde mit FRIEDEL-CRAFTS-Katalysatoren durchgeführt. Das Monomerengemisch bestand nur aus dem 1-Methyl- und 2-Methyl-Isomeren. Während der Polymerisation trat keine Isomerisierung der Monomeren ein. Alle erhaltenen Polymeren waren in organischen Lösungsmitteln wie z. B. Toluol löslich. Die Polymerisationsgeschwindigkeit und die Viskosität des Polymeren fällt mit steigender Konzentration von 1-Methylcyclopentadien in der zugesetzten Monomerenlösung. Die Struktur des Polymeren wurde NMR-spektroskopisch ermittelt. Es wurde gezeigt, daß der gröte Teil der 1-Methylcyclopentadieneinheiten in Form der 3.4-Struktui, 70 bis 95% der 2-Methylcyclopentadieneinheiten als 1.4-Struktur und der restliche Teil als 3.4-Struktur eingebaut wird. Das Verhältnis zwischen der 1.4-Struktur und der 3.4-Struktur der 2-Methylcyclopentadieneinheiten indert sich mit den Polymerisationsbedingungen, jedoch nicht mit der Monomerenzusammensetzung.
    Notes: Polymerization of methylcyclopentadiene was carried out with FRIEDEL-CRAFTS catalysts. The monomer contained 1-methyl and 2-methyl isomers only. No isomerization of the monomer occurred during polymerization. All the polymers obtained were soluble in organic solvents such as toluene. The rate of polymerization and the intrinsic viscosity of the polymer decreased with increasing concentration of 1-methylcyclopentadiene in the monomer feed. The structure of the polymer was determined by NMR spectroscopy and it was shown that most of the 1-methylcyclopentadiene units were incorporated as the 3.4-structure, 70 to 95% of the 2-methylcyclopentadiene units as the 1.4-structure and the residual part as the 3.4-structure. The ratios of the 1.4- and 3.4-structures of the 2-methylcyclopentadiene units changed with polymerization conditions but not with monomer composition.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1967.021090115
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  • 10
    Electronic Resource
    Electronic Resource
    Studies on the polymerization of bifunctional monomers. XV. Anionic polymerization of o-divinlbenzeneContribution No. 145 from this department. Presented in part at the 19th Annual Meeting of the Chemical Society of Japan, March, 1966.Part XIV. Telomerization of divinylformal, C. ASO, T. KUNITAKE, and F. TSUTSUMI, J. chem. Soc. Japan, ind. Chem. Sect. [Kōgyō Kagaku Zasshi] 70 (1967) 2043. (1968)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 116 (1968), S. 14-25 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: o-Divinylbenzol wurde mit folgenden anionischen Katalysatoren polymerisiert: n-Butyllithium, Phenyllithium, Lithiumnaphthalin, Kaliumnaphthalin und Natriumnaphthalin. Der Anteil an cyclischen Bausteinen im Polymeren ist generell gringer als bei der kationischen Polymerisation. Der Einfluß der Art des Gegenkations und des Lösungsmittels auf die Cyclisierungskonstante rc stimmt bei den Alkalimetall-Naphthalin-Katalysatoren qualitativ mit der Wirkung dieser Variablen auf die Geschwindigkeit der anionischen Polymerisation des Styrols überein, wenn man berücksichtigt, daß rc, parallel mit der Reaktivität des nichtcyclischen Anions zunimmt.Im System Natriumnaphthalin/THF nimmt rc, bei Zusatz von NaBPh4 ab; diese Beobachtung wird als Hinweis auf eine frei-anionische Wachstumsreaktion gewertet. Im selbe System wurde die Differenz der Aktivierungsenergien zwischen intramolekularer Cyclisierung und intermolekularem Wachsturn zu 2-3 kcal·mol-1 abgeschätzt.
    Notes: Anionic polymerization of o-divinylbenzene was carried out with organolithium and alkalimetal-naphthalene catalysts. The extent of cyclization in polymer was generally smaller than in cationic polymerization. The influence of the counter cation and of the solvent on the cyclization constant, rc, observed in polymerization with alkalimetal-naphthalene catalysts agreed qualitatively with that on the rate of anionic propagation of styrene in the same system, if rc was considered to increase with the reactivity of the uncyclized anion.In the sodium naphthalene/THF system, rc decreased on addition of NaBPh4 and this result was considered to indicate the free-anion propagation. In the same system, the apparent difference in activation energy between intramolecular cyclization and intermolecular propagation was 2-3 kcal·mole-1.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1968.021160103
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