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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 20 (1982), S. 2033-2041 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The copolymerization of 3,4-dimethyltetrahydrofuran with selected cyclic ethers was studied. Although 3,4-dimethyltetrahydrofuran did not homopolymerize, it readily copolymerized with propylene oxide and epichlorohydrin in an alternating fashion using the cationic initiator PF5. The reactivity ratios r1 and r2 for the copolymerization of 3, 4-dimethyltetrahydrofuran and epichlorohydrin were r1 = 0.22 ± 0.05 and r2 = 0.11 ± 0.01, respectively.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Poly(1,1-dimethylpropan) wurde mittels der Wurtzschen Reaktion synthetisiert. Das erhaltene Polymer hat nur mäßige relative Molekülmasse, ist zu etwa 50% kristallin und hat eine Schmelztemperatur von 87°C sowie eine Glasübergangstemperatur von -17°C. Das Polymer ist im wesentlichen das gleiche Material, das durch kationische Hydrid-transfer-Polymerisation von 3-Methyl-buten-1 bei niedrigen Temperaturen oder durch kationische Ringöffnungs-polymerisation von 1,1-Dimethylcyclopropan erhalten wird. Poly(1,1-dimethylpropan) wurde nach der Wurtzschen Synthese nur in niedriger Ausbeute erhalten; ein wesentlicher Teil des Reaktionsproduktes war 1,1-Dimethylcyclopropan.
    Notes: Poly(1,1-dimethylpropane) was synthesized by Wurtz coupling polymerization. The polymer was of moderate molecular weight, about 50% crystalline, had a melting temperature of 87°C and a glass transition temperature of -17°C. The polymer was essentially the same material as that obtained by cationic hydride transfer polymerization of 3-methylbutene-1 at very low temperatures, or by cationic ring opening polymerization of 1,1-dimethylcyclopropane. Poly(1,1-dimethylpropane) obtained by the Wurtz reaction was obtained in only low yield; a substantial part of the total reaction product was 1,1-dimethylcyclopropane.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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