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  • 1
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    Herstellung der Butadiencopolymerisate mit Methacrolein, Acrolein bzw. Äthylacrolein durch die radikalische Polymerisation. 3. Mitt.: Blockpolymerisation (1975)
    Springer
    Details
    Publication Date: 1975-03-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 2
    Electronic Resource
    Electronic Resource
    Herstellung der Butadiencopolymerisate mit Methacrolein, Acrolein bzw. Äthylacrolein durch die radikalische Polymerisation. 3. Mitt.: Blockpolymerisation (1975)
    Springer
    Colloid & polymer science 253 (1975), S. 268-268 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01470259
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  • 3
    Electronic Resource
    Electronic Resource
    Reactive polymers. XXI. Preparation and characterization of crosslinked polymers with functional aldehyde groups and their reactivityPart XX: F. Švec, H. Hrudková, J. Kálal, Angew. Makromol. Chem. 70 (1978) 101. (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 71 (1978), S. 201-214 
    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: Die vernetzende Copolymerisation von Styrol, Divinylbenzol und Methacrolein bzw. von Divinylbenzol und Methacrolein wurde im Hinblick auf die Reaktivität der funktionellen Aldehydgruppen untersucht. Die Oberflächeneigenschaften der Polymeren und ihre Reaktivität hängen von der Zusammensetzung der bei der Suspensionspolymerisation verwendeten inerten Phase ab.
    Notes: Crosslinking polymerization leading to poly(styrene-co-divinylbenzene-co-methacrolein) and poly(divinylbenzene-co-methacrolein) was studied together with the reactivity of the functional aldehyde groups. The surface characteristics of prepared polymers and their reactivity depend on the composition of the inert phase used in the suspension polymerization.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050710116
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  • 4
    Electronic Resource
    Electronic Resource
    Decomposition of hydrogen peroxide catalyzed by perchloric acid. Application of this initiation system in the preparation of HO-terminated telechelic polymers of butadiene (1980)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 86 (1980), S. 33-46 
    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: Es wurde die Kinetik der Zersetzung von Wasserstoffperoxid in Gegenwart von HClO4 untersucht. Die Reaktion verlief in bezug auf [H2O2]0 nach 2. Ordnung und in bezug auf [HClO4]0 nach 1. Ordnung. Der Wert der Aktivierungsenergie betrug 102,5 kJ · mol-1. Die Zersetzung des Wasserstoffperoxids wurde durch Sauerstoff gehemmt und durch Allylverbindungen beschleunigt. Der Reaktionsmechanismus der Zersetzung von Wasserstoffperoxid in Gegenwart der HClO4 wird aufgrund der kinetischen Daten diskutiert. Diese Reaktion wurde als Startreaktion für die radikalische Synthese von HO-telechelen Oligobutadienen und Copolymerisaten des Butadiens mit polaren Monomeren verwendet.
    Notes: The kinetics of hydrogen peroxide decomposition was followed in the presence of perchloric acid. The reaction was of second order with respect to the initial concentration of hydrogen peroxide and of first order with respect to the concentration of perchloric acid; the determined activation energy was 102.5 kJ · mol-1. The investigated reaction was retarded by oxygen and accelerated by allyl compounds. The mechanism of hydrogen peroxide decomposition in the presence of perchloric acid is discussed on the basis of kinetic parameters. The reaction was utilized in the initiation of radical synthesis of HO-terminated telechelic polybutadienes and copolymers of butadiene with polar vinyl compounds.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1980.050860103
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  • 5
    Electronic Resource
    Electronic Resource
    The decomposition of hydrogen peroxide catalyzed with BF3 etherate; the use of this initiation system in the preparation of HO-terminated telechelic polymers and copolymers of butadiene (1980)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 92 (1980), S. 107-120 
    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: Die Kinetik des katalysierten Zerfalls von Wasserstoffperoxid in Gegenwart von Bortriflouridetherat wurde untersucht und die grundlegenden zur Diskussion des Mechanismus notwendigen kinetischen Parameter wurden bestimmt. Das System H2O2-BF3-Etherat wurde zum Start der radikalischen Polymerisation und Copolymerisation von Butadien benutzt. Der Parameter ϕ wurde aus der Analyse der Kinetik der Copolymerisation von Butadien mit Acrylnitril mit Hilfe der Simha-Branson-Gleichung bestimmt. Die Abhängigkeit von ϕ von der Copolymerzusammensetzung wurde auf Grund der Arlman-Gleichung interpretiert. Die Kreuzabbruchreaktion bei der Copolymerisation von Butadien mit Acrylnitril wurde mit theoretischen und experimentellen Funktionen beschrieben.
    Notes: Kinetics of the catalyzed decomposition of hydrogen peroxide in the presence of BF3 etherate were investigated, and the basic kinetic parameters used in the discussion of the mechanism of this reaction were determined. The system hydrogen peroxide-BF3 etherate was used in the initiation of the radical polymerization and copolymerization of butadiene. The parameter ϕ was determined using an analysis of the kinetics of copolymerization of butadiene with acrylonitrile and the Simha-Branson equation; the dependence of ϕ on the composition of the copolymerization mixture was interpreted in terms of Arlman's equation. The cross-termination reaction occuring in the copolymerization of butadiene with acrylonitrile was characterized by comparing theoretical and experimental functions.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1980.050920109
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  • 6
    Electronic Resource
    Electronic Resource
    Reactive polymers. XII. Bead macroporous methacrylate terpolymers containing aldehyde groups (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 66 (1978), S. 75-93 
    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: Makroporöse Perl-Terpolymere aus Methacrylaldehyd, Methylmethacrylat und äthylendimethacrylat wurden hergestellt. Die Polymerisationsbedingungen (Zusammensetzung der Monomermischung und der inerten Phase, die Konzentration an Initiator und an Suspensionsstabilisator, Rühregeschwindigkeit) werden im Hinblick auf die Eigenschaften der Terpolymeren (Porosität und Konzentration an reaktiven Aldehydgruppen) diskutiert.Die Konzentration an reaktiven Gruppen wurde durch Zugabe des dritten Monomeren variiert. Die analytisch bestimmten Unterschiede in der Konzentration an reaktiven Gruppen im Monomerengemisch und im Polymeren werden interpretiert (a) durch Unerreichbarkeit der Gruppen im Innern der Substanz, (b) durch Bildung von Tetrahydropyranringen und Acetatbin lungen zwischen den Ketten und (c) duch Bildung von extrahierbaren Polymeren und Copolymeren sowie nichtumgesetzten Anteilen an Monomeren.
    Notes: Bead macroporous terpolymers of methacrylaldehyde with methyl methacrylate and ethylene dimethacrylate were prepared. Preparation conditions (composition of the monomer mixture, of the inert components, concentration of the initiator and of the suspension stabilizer, and the rate of stirring) were discussed with respect to the properties of the terpolymers (porosity and concentration of reactive aldehyde groups).Concentration of reactive groups in the polymer was controlled by adding a third monomer. The analytically determined differences in the concentration of the reactive groups in the batch and in the polymer were interpreted (a) by the inaccessibility of the groups within the polymer bulk (for polymers with 30-50 mol-% of crosslinking agent), (b) by the presence of tetrahydropyran rings or acetate bonds between the chains, and (c) by the formation of extractable soluble polymers or copolymers, or by not reacting of parts of the monomers (observed predominantly with low-crosslinked polymers containing 10 mol-% of crosslinking agent).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050660107
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation and properties of copolymers of methyl-2,3,3-trifluoroacrylate with alkenes and alkyl vinyl ethers (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 141 (1986), S. 131-139 
    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 eine mit Diisopropoxycarbonylperoxid initiierte radikalische Lösungspolymerisation wurden Copolymere von Methyl-2,3,3-trifluoracrylat mit Isobutylen, Propylen, Ethylen und n-Alkylvinylethern (wobei Alkyl Ethyl, Propyl oder Butyl bedeutete) hergestellt. Die Struktur der Copolymeren entspricht einer alternierenden Zusammensetzung der Methyltrifluoracrylat- und Comonomer-Einheiten. Die Polymerisationsgeschwindigkeit und die Molekulargewichte sind durch das Verhältnis der beiden Monomeren und durch die Art des Vinylmonomeren bedingt. Die alkalische Hydrolyse der Trifluoracrylateinheiten liefert Copolymere der Trifluoracrylsäure. Der Dissoziierungsgrad der Copolymeren wird durch den pK-Wert charakterisiert. Die Hydrolysegeschwindigkeit ist stark von der Struktur des Copolymeren abhängig. Die Polymeren sind gut beständig gegen höhere Temperaturen, und eine thermische Zersetzung erfolgt erst bei über 300°C.
    Notes: Copolymers of methyl-2,3,3-trifluoroacrylate with isobutylene, propylene, ethylene, and n-alkyl vinyl ethers, (the alkyl being ethyl, propyl, butyl) glycidyl vinyl ether, and 2-methoxyethylvinyl ether were prepared by radical solution polymerization using di(isopropoxycarbonyl) peroxide as the initiator. Their structure was that of the alternating order of methyltrifluoroacrylate and the respective vinyl monomer units. The rate of copolymerization and molecular weights of the copolymers were determined by the ratio of both monomers and by the character of the vinyl comonomer. By means of the alkaline hydrolysis of trifluoroacrylate units, the corresponding copolymers of trifluoroacrylic acid were prepared. Their degree of dissociation was characterized by pK values. The rate of alkaline hydrolysis was considerably affected by the copolymer structure. The polymeric materials prepared in this study possessed good thermal stability, and their thermal decomposition did not occur below 300°C.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1986.051410113
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  • 8
    Electronic Resource
    Electronic Resource
    Radical copolymerization and terpolymerization of 1,1,2,3,4,4-hexafluoro-1,3-butadiene with alkylvinyl ethers, alkenes, and methyl-2,3,3-trifluoroacrylate (1987)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 155 (1987), S. 101-115 
    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: Copolymers of 1,1,2,3,4,4-hexafluoro-1,3-butadiene (HFB) with n-alkylvinyl ethers (AVE) (alkyl being butyl, propyl, ethyl, and glycidyl) or alkenes of the type isobutylene, ethylene, and propylene were synthesized by the solution radical copolymerization using low-temperature peroxide initiators. The reaction proceeded by radical mechanism and was fully inhibited by the addition of 1,1-diphenyl-2-picryl-hydrazyl.
    Notes: Copolymere von 1,1,2,3,4,4-Hexafluor-2,3-butadine (HFB) mit n-Alkylvinylethern(AVE) (Alkyl = Butyl, Propyl, Ethyl and Glycidyl) order mit Alkenen wie isobuten, Ethylen and Propylen wurden durch radikalische Lösungscopolymerisation unter Verwendung von peroxidischen Neidertemperatureinition synthesiert. Die Polymerisation verlief nach radikalischem Mechanismus and wurse durde durch die Zugable vo 1,2-Diphenyl-2-pikryl-hydrazyl völling inhibiert. Die Anfangsgeschwindigkeit der Copolymerisation hing von der Gesamtkozentration der Monomeren and von von dem Verhältnis [HFB] zu [AVE] ab; die maximale Reaktiongeschwindigkeit wurde bei etea äquimolaren Konzentrationsverhältnissen der monomeren erzielt.Durch die untersuchung der Struktur der copolymeren HFB-AVE wurde die alter-neirende Anordnung der Hexafluorobutadien-and Vinylethereinheinten in der Copolymerkette nachgewiesen. Durch die radikalische Lösungsterpolymerisation des Monomerensystems HFN-AVE Methyl-2,3,3,-trifluoracrylet (MTFA) wurden Terpolymere des Typus-[HFB]x-[AVE]y-[MTFA]z -synthetisirt, deren Struktur einer alternierrenden Anordnung von Perfluor- (HFB and MTFA) and Vinylethereinheiten entspricht. Durch alkalische hydrolyse der Trifluoracrylateinheiten wurden die entsprechenden Terpolymeren der Triflurocrylsäure synthesiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1987.051550109
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  • 9
    Electronic Resource
    Electronic Resource
    Preparation of monodisperse reactive styrene-glycidyl methacrylate latexes by the emulsifier-free dispersion copolymerization technique (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 21 (1983), S. 2949-2960 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Latexes based on styrene-glycidyl methacrylate copolymers were prepared by the emulsifier-free dispersion copolymerization technique. The main factors affecting the size and morphology of the latex particles and their distribution are the initiator concentration (K2S2O8), the total ionic strength of the aqueous phase, and the total monomer concentration. The existence of critical values for these variables was demonstrated. In the range in which these factors had values below the critical, the synthesized latex particles were spherical, homogeneous, and in varied sizes, depending on the abovementioned parameters in the range of 220-500 nm. Above the critical values of these variables the latex particles consisted of spherical aggregates of smaller particles. The reactive oxirane groups of the latex particles were modified later by hydrolysis, ammonolysis, reaction with Na2S, or periodic acid oxidation of the hydrolyzed or ammonolyzed forms of the latex particles.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.170211011
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  • 10
    Electronic Resource
    Electronic Resource
    Immobilization of Escherichia coli cells with penicillin-amidohydrolase activity on solid polymeric carriers (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 25 (1983), S. 2231-2242 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Whole cells of Escherichia coli containing the enzyme penicillinamidohydrolase EC 3.5.1.11 were immobilized on the surface of modified macroporous copolymers of glycidylmethacrylate with ethylenedimethacrylate and of copolymers of methacrylaldehyde (MA) with divinylbenzene (DVB) by means of glutaraldehyde. These polymeric carriers were modified before cell binding by using ammonia or polyamines, especially ethylenediamine and hexamethylenediamine (HMDA). The highest specific activity and the largest yield in cell immobilization were achieved with the macroporous copolymer of MA and DVB modified with HMDA. The material thus obtained was used in repeated conversions of benzylpenicillin to 6-aminopenicillanic acid in a stirred batch reactor.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260250909
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