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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of tetrahydrofuran-styrene and tetrahydrofuran-methyl methacrylate block copolymers via poly(tetrahydrofuran) with azo groups (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 238 (1996), S. 55-62 
    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: Tetrahydrofuran (THF) wurde mit dem Initiatorsystem 4,4′-Azobis(4-cyanopentanoylchlorid)/SnCI4 kationisch polymerisiert. Das gebildete Poly(THF) mit je einer Azogruppe in der Hauptkette wurde als Initiator für die Polymerisation von Styrol (S) und Methylmethacrylat (MMA) bei 70°C eingesetzt. Die dabei entstandenen PTHF-PS-PTHF- bzw. PTHF-PMMA-Blockcopolymeren wurden mittels Fällungsfraktionierung, spektroskopischen Methoden und Viskositätsmessungen charakterisiert.
    Notes: The cationic polymerization of tetrahydrofuran (THF) initiated by 4,4′-azobis(4-cyanopentanoyl chloride) (ACPC) and SnCI4 is described. Poly(THF) samples possessing azo gorups in the main chain thus obtained were used as initiator in the polymerization of styrene (S) and methyl methacrylate (MMA) at 70°C to yield PTHF-PS-PTHF and PTHF-PMMA block copolymers. Characterization of the block copolymers was carried out by fractional precipitation, spectroscopic methods and viscosity measurements.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052380105
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation of multiphase block copolymers by redox polymerization process (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 195 (1992), S. 121-127 
    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: Durch Ce(IV)-initiierte Redoxypolymerisation von Methylmethacrylat mit Poly(oxyethylen), das Azo- und Hydroxygruppen enthielt, wurden Copolymere mit labilen Azogruppen in der Hauptkette erhalten. Diese Prepolymeren wurden zur durch thermischen Zerfall der Azogruppen initiierten radikalischen Polymerisation von Styrol eingesetzt, wobei Multiblockcopolymere entstanden, was durch fraktionierte Fällung, Änderung der Molekulargewichtsverteilung und spektroskopische Messungen nachgewiesen wurde.
    Notes: Redox polymerization of methylmethacrylate (MMA) using Ce(IV) with poly(oxyethylene) having azo and hydroxy functions was carried out to yield methylmethacrylate-ethylene glycol block copolymers with labile azo linkages in the main chain. These prepolymers were used to initiate the radical polymerization of styrene through the thermal decomposition of the azo group, resulting in the formation of multiblock copolymers. Successful blocking has been confirmed by fractional precipitation, a strong change in the molecular weight distribution and spectral measurements.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051950109
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation of multiphase block copolymers by redox polymerization process, 3Part 2 cf4. Polymerization of methyl methacrylate and acrylamide by the Mn(III)-poly(ethy1ene glycol) redox system (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 224 (1995), S. 1-8 
    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: Durch redoxinitiierte radikalische Polymerisation von Methylmethacrylat (MMA) und Acrylamid (AAm) mit Polyethylenglykol (PEG) und Mn(III) als Reduktionsmittel wurden PMMA-PEG-PMMA- und AAm-PEG-AAm-Triblockcopolymere hergestellt. Der EinfluR der Konzentration der Reaktanden und der Temperatur auf den Umsatz und die Grenzviskositat der Copolymeren wurde untersucht. Die Blockcopolymeren wurden mittels 'H-NMR- und IR-Spektroskopie charakterisiert.
    Notes: Redox-initiated free-radical polymerization of methyl methacrylate (MMA) and acrylamide (AAm) with poly(ethy1ene glycol) (PEG) using Mn(III) as reduction agent was carried out to yield PMMA-block-PEG-block-PMMA and AAm-block-PEG-block-AAm triblock copolymers. The principal parameters (concentration of the reactants, temperature) affecting the synthesis were examined. Block copolymers were characterized by 'H-NMR and infrared spectroscopy.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052240101
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation of multiphase block copolymers by redox polymerization process, 4Part 3 cf.1. Polymerization of methyl methacrylate by the redox system Mn(III)-poly(ethylene glycol) containing azo groups (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 224 (1995), S. 49-54 
    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: Durch redoxinitiierte radikalische Polymerisation von Methylmethacrylat (MMA) mit Azogruppen enthaltendem Polyethylenglykol (PEG) und Mn(III) als Reduktionsmittel wurden PMMA-PEG-PMMA-Triblockcopolymere mit Azogruppen in der Polymerkette hergestellt. Mit diesen Prepolymeren wurde durch thermischen Zerfall der Azogruppen die radikalische Polymerisation von Styrol initiiert, wobei Multiblockcopolymere gebildet wurden, die durch fraktionierte Fällung, eine starke Zunahme des Molekulargewichts sowie 1H-NMR- und IR-Spektroskopie nachgewiesen wurden.
    Notes: Redox polymerization of methyl methacrylate using Mn(III) with poly(ethylene glycol) having azo and hydroxy functions was carried out to yield ethylene glycolmethyl methacrylate block copolymers with labile azo linkages in the main chain. These prepolymers were used to initiate free-radical polymerization of styrene through thermal decomposition of the azo groups, resulting in the formation of multiblock copolymers. Successful blocking has been confirmed by fractional precipitation, a strong change in the molecular weight, and spectral measurements.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052240105
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  • 5
    Electronic Resource
    Electronic Resource
    Photopolymerization of styrene and methyl methacrylate using macro photoinitiators. Synthesis and characterization of PS-PEG-PS or PMMA-PEG-PMMA block copolymers (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 231 (1995), S. 123-133 
    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: Makrophotoinitiatoren aus Poly(ethylenglykol) (PEG) mit Benzoylxanthat-Segmenten wurden durch Reaktion der PEG-Xanthate mit Benzoylchlorid hergestellt. Diese Makrophotoinitiatoren mit PEGs unterschiedlicher Molekulargewichte wurden eingesetzt, um durch lichtinduzierte radikalische Polymerisation von Styrol und Methyl-methacrylat Blockcopolymere mit inneren PEG-Segmenten zu synthetisieren. Der Ein-fluß der Konzentration der Reaktanden und der Polymerisationszeit auf die Ausbeute und die Viskosität der Blockcopolymeren wurde untersucht. Die Blockcopolymeren wurden durch fraktionierte Fällung und IR-, UV- und 1H-NMR-Spektroskopie charakterisiert.
    Notes: Macro photoinitiators based on poly(ethylene glycol)s (PEG) bearing benzoyl xanthate moieties were synthesized by the reaction of PEG xanthates with benzoyl chloride. These macro photoinitiators possessing PEGs of different molecular weights were used in the photoinduced radical polymerization of styrene (S) and methyl methacrylate (MMA) to yield block copolymers having an inner-PEG segment. The influence of the concentration of reactants and polymerization time on the yield and intrinsic viscosities of block copolymers were also investigated. Characterization of block copolymers was carried out by fractional precipitation and IR, UV and 1H NMR spectroscopic methods.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052310111
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  • 6
    Electronic Resource
    Electronic Resource
    Preparation of multiphase block copolymers by redox polymerization process, 2Part 1 cf.14.. Polymerization of acrylonitrile by the Mn(III)-poly(ethylene glycol) redox system (1993)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 211 (1993), S. 53-60 
    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: Poly(ethylenglykol-block-acrylnitril) wurde durch Polymerisation von Acrylnitril in Gegenwart von Polyethylenglykol mit Mn (III) als Initiator erhalten. Die Haupteinflußfaktoren für die Polymerisation (Konzentration der Reaktanden, Temperatur) wurden untersucht. Infrarot- und 1H-NMR-Spektroskopie sowie Gelpermeationschromatographie belegen die Bildung von Blockcopolymere.
    Notes: Redox polymerization of acrylonitrile (AN) with poly(ethylene glycol) using Mn(III) as catalyst was carried out to yield poly(ethylene glycol-block-acrylonitrile). The principal parameters (concentration of reactants, temperature) affecting the synthesis were examined. Successful blocking has been confirmed by infrared and 1H nuclear magnetic resonance spectroscopy as well as gel permeation chromatography.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1993.052110105
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