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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Macromolecules 27 (1994), S. 171-178 
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 14 (1976), S. 2415-2431 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Poly(n-heptaldehyde) has been prepared by anionic and cationic polymerization at -60°C in methyl cyclohexane. The anionic polymer is more crystalline and of a higher degree of isotactic structure than the somewhat rubbery but still crystalline cationic polymer. The polymers have been acetate-endcapped to improve their thermal stability. Cationic polymer, when endcapped and purified, begins to degrade above room temperature; even crystalline anionic polymer degrades at a reasonable rate at 100°C. The crystallinity of poly(n-heptaldehyde) is caused by crystallization of the acetalic main chain as well as the side chain. Two regions of melting have been recognized by DSC analysis and by microscopic observations. The low melting region between 80 and 100°C has been identified as the melting of the paraffinic side chains of poly(n-heptaldehyde). It consists of three clearly definable endotherms at 78, 87, and 101°C.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 14 (1976), S. 2995-3012 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Crystalline polymers of n-valeraldehyde, n-hexaldehyde, n-heptaldehyde, and n-octaldehyde were prepared by anionic polymerization with lithium tertiary butoxide as the initiator at low temperatures. The polymers were end-capped with acetic anhydride, and their thermal stability was studied primarily by DTG. It was found that all polymers degrade rapidly above 150°C. All polymers show a dual melting-point behavior. The first melting region, which is associated with the melting of the side chain, is 80-85°C for poly(n-valeraldehyde); 87-90°C for poly(n-hexaldehyde); 78-101°C for poly(n-heptaldehyde); and 41-69°C for poly(n-octaldehyde). Annealing and quenching of the samples showed that this melting-point region consisted of several endotherm peaks whose intensity changed according to the thermal history of the sample. Although the samples are apparently highly crystalline, the side-chain crystallinity is apparently only in the 20% range.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 5
    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 vorliegende Arbeit befaßt sich mit dem Polymerisationsverhalten von Vinylferrocen und Äthinylferrocen in Anwesenheit einiger klassischer Initiatoren oder Katalysatoren. Äthinylferrocen wurde mittels Iauroylperoxid und B(iso-C3H7)3 als radikalischem Initiator und mittels substituierter Phosphinkomplexe von Übergangsmetallen als Katalysator polymerisiert; für den letzteren Fall wird ein Reaktionsmechanismus vorgeschlagen. Vinylferrocen wurde in Gegenwart von löslichen ZIEGLER-Systemen, z. B. AlEt2Cl/Cu(C5H7O2)2, zu polymerisieren, schlugen fehl. Im Gegensatz zu Äthinylferrocen konnte Vinylferrocen in guter Ausbeute mit dem System [-P(C6H5)2]2·Ni(C5H7O2)2 polymerisiert werden.Die thermischen und elektrischen Eigenschaften der erhaltenen Polymeren wurden untersucht.
    Notes: The present paper deals with the polymerization of vinylferrocene and ethynylferrocene in the presence of some initiators or catalysts used for the polymerization of classical vinyl and ethynyl monomers. Ethynylferrocene was polymerized with lauroyl peroxide and B(iso-C3H7)3 as radical initiators and with substituted phosphine-transition metal complexes as catalysts, a reaction mechanism being proposed for the last case. Vinylferrocene was polymerized with soluble ZIEGLER systems, e.g., AlEt2Cl/Cu(C5H7O2)2. Attempts to polymerize vinylferrocene with phosphine complexes and ethynylferrocene with soluble ZIEGLER catalyst, Al(iso-C4H9)3/VO(C5H7O2)2, were unsuccesfully. However, vinylferrocene unlike ethynylferrocene was polymerized with good yields in the presence of the system [-P(C6H5)2]2·Ni(C5H7O2)2.The polymers obtained were investigated with respect to their thermal and electrical properties.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 13 (1975), S. 17-22 
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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