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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 67 (1980), S. 366-367 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 178 (1977), S. 2527-2534 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The reaction of ethylene glycol, 1,4-butanediol, 1,6-hexanediol, 3,6-dioxaoctane-1,8-diol (triethylene glycol), poly(ethylene oxide)s with M̄n = 300,1000 and 3000, or with poly(propylene oxide)s with M̄n = 425 and 2000 in excess with AIBN leads to the corresponding bis(hydroxyalkyl) 2,2′-azodiisobutyrates (1a-i). These initiators are suited to synthesize telechelics. With equimolar amounts of AIBN and 3-oxapentane-1,5-diol (diethylene glycol), poly(ethylene oxide)s with M̄n = 300, 1000 and 12000, poly(propylene oxide) with M̄n = 425, or with poly(tetrahydrofuran) with M̄n = 1000 and 2000 polymeric azoinitiators of structure 2 are formed. Blockcopolymers may be synthesized by means of these polymeric azocompounds.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 33 (1894), S. 754-764 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 121 (1969), S. 102-116 
    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: Optimal conditions and limits of application for gelchromatographic separation of mixtures into signle components are discussed. The choice of a gel with the proper pore size distribution has a decisive influence on the separation obtainable. Low moleculare polystyrenes, poly(butyl methacrylates), poly(ethylene oxides), polyepoxides and tensides were separated. A polymerhomologous series can be separated up to a polymerisation degree of 15 into single peaks, up to a polymrisation degree of 30 not fully resolved peaks are obtained.
    Notes: Die optimalen Bedingungen und die Anwendungsgrenzen der Gelchromatographie zur Trennung von Gemischen in Einzelkomponenten werden diskutiert. Die Wahl eines Gels mit geeigneter Porengrößenverteilung hat einen entscheidenden Einfluß auf die erzielbare Trennung. Niedermolekulare Polystyrole, Polybutylmethacrylate, Polyäthylenoxide, Polyexpoxide und verschiedene Tenside werden getrennt. Eine polymerhomologe Reihe läßt sich etwa bis zum Polymerisationsgrad 15 in einzelne Glieder trennen; bis zum Polymerisationsgrad 30 sind in den Schreiberkurven nicht vollständig aufgelöste Peaks zu erkennen.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
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