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  • Digitale Medien  (11)
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  • Digitale Medien  (11)
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  • 1
    Digitale Medien
    Digitale Medien
    Synthesis of casein-g-poly(butyl acrylate) (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 1799-1806 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1980.070250828
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  • 2
    Digitale Medien
    Digitale Medien
    Small angle scattering from ampholytic styrene ionomersSome of these results were presented at the American Physical Society March Meeting, Dallas, 1982, and at the IUPAC Macro 82 Meeting, Amherst, July, 1982. (1984)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 24 (1984), S. 385-390 
    Details
    ISSN: 0032-3888
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Small angle neutron scattering experiments were made on an ionomer synthesized from perdeuterostyrene and an ion pair comonomer. A Debye plot based on data from the sample with lower ion concentration gave a correlation length of 5.3A. Clustering is not significant in this sample. With a higher concentration of ionic groups a peak in the scattering curve is interpreted as due to clusters about 20A in diameter. These studies along with X-ray scattering and electron microscopy also indicate the presence of larger ion rich domains.
    Zusätzliches Material: 11 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pen.760240514
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  • 3
    Digitale Medien
    Digitale Medien
    Studies on graft copolymerization of acrylate monomers onto casein (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 329-339 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Poly(butyl acrylate) has been graft copolymerized onto casein using potassium peroxydisulfate-ascorbic acid as the initiating system. The proof of grafting has been obtained by ninhydrin test and IR studies. The effects of synthetic variables in the graft copolymerization have been discussed in the light of percent grafting, grafting efficiency, and the rates of polymerization.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1984.070290131
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  • 4
    Digitale Medien
    Digitale Medien
    Oxygen-ascorbic acid-Copper(II) initiating system. A kinetic study of the polymerisation of methyl acrylate in aqueous medium (1982)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 183 (1982), S. 905-913 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Polymerisation of methyl acrylate (MA) initiated by O2-ascorbic acid (AA)-Cu2+ system was studied in aqueous medium at 40°C. The rate of polymerisation Rp, was found to increase, remain constant, and then decrease with increasing [Cu2+]. Rp was found to depend on [Cu2+]0,6, [AA]0, [O2]0,6, and [MA]1,3 in the increasing region, on [Cu2+]0, [AA]0, [O2]0,6, and [MA]1,6 in the constant region and on [Cu2+]-0,9, [AA]0, [O2]0,7, and [MA]2,0 in the decreasing region. Rate laws were derived assuming a plausible reaction mechanism for the different regions. Rp increased with ionic strength and decreased with [H2SO4,]. An initial increase, then steady state followed by a decrease in rate with temperature was noticed in the range 25 - 55°C. kp/kt1/2 values were calculated and compared with literature values. Chain lengths were determined viscometrically.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1982.021830414
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  • 5
    Digitale Medien
    Digitale Medien
    Thermal analysis of oxidized poly(acrylonitrile-co-methyl methacrylate) (1979)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 180 (1979), S. 2923-2928 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Poly(acrylonitrile-co-methyl methacrylate) films were oxidized in an air oven and in an oxidation chamber at temperatures of 80 to 200°C. Differential thermal analysis of these oxidized films showed that the exothermic peaks increased with increasing oxidation temperature. The change of viscosity, the insolubility in dimethylformamide and IR analyses indicate both intramolecular and intermolecular reactions.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1979.021801213
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  • 6
    Digitale Medien
    Digitale Medien
    Oxygen-ascorbic acid-ferric ion initiating system. Kinetics of polymerization of methyl methacrylate (1983)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 115 (1983), S. 61-74 
    Details
    ISSN: 0003-3146
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Beschreibung / Inhaltsverzeichnis: Es wurde die Kinetik der Polymerisation von Methylmethacrylat in verdünntem salpetersaurem Medium bei 40°C mit einem Dreikomponenteninitiator  -  Saurestoff-Ascorbinsäure-Fe3+ionen  -  untersucht. Die Polymerisationsgeschwindigkeit, Rp, erwies sich bei unterschiedlichen experimentellen Bedingungen proportional [MMA]1,5. Rp war unabhängig von der [Fe3+] innerhalb der Konzentrationsreihe 2-5·10-5M, erniedrigte sich aber bei höheren Werten. Rp war auch unabhängig von der [AA] und für [O2] 〈 6,5·10-4M wurde eine Abhängigkeit [O2]0,6 gefunden.
    Notizen: The kinetics of polymerization of methyl methacrylate (MMA) in dilute nitric acid medium at 40°C initiated by the three component initiating system, oxygen-ascorbic acid (AA)-ferric ions was investigated. The rate of polymerization, Rp, was found to be proportional to [MMA]1.5 under different experimental conditions. Rp, was independent of [Fe3+] in the concentration range 2 to 5 - 10-5 M, but decreased slightly at higher values. Rp was also independent of [AA] and a dependence on [O2]0.6 was noticed with [O2] 〈 6.5 × 10-4M. After an initial increase, Rp became independent above [HNO3] ≈ 0.3M. Ionic strength, μ, of the medium had no effect on Rp. A rate increase up to 42°C followed by constancy and decrease with further increase in temperature (〉46°C) was noticed. The chain lengths of the polymers were determined to be in the range 102  -  103 by viscometry. A plausible reaction mechanism with initiation by the primary radical and termination by mutual interaction was proposed.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/apmc.1983.051150106
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  • 7
    Digitale Medien
    Digitale Medien
    Light-induced graft copolymerization of vinyl monomers to collagen by use of benzophenone as sensitizer (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 2953-2956 
    Details
    ISSN: 0360-6376
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1974.170121221
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  • 8
    Digitale Medien
    Digitale Medien
    Dye-sensitized photopolymerization of vinyl monomers in the presence of ascorbic acid-sodium hydrogen orthophosphate complex (1972)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 10 (1972), S. 1511-1528 
    Details
    ISSN: 0449-296X
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The kinetics of photopolymerization of vinyl monomers (methyl methacrylate, methylacrylate, and acrylonitrile) sensitized by the dyes acridine orange, dahlia violet, rose bengal and Pyronine G have been studied systematically. Systems containing dye, reducing agent, and monomer were irradiated with light of wavelengths 365 mμ, 546 mμ, and 405 mμ. The induction period was kept to a minimum by suitable experimental conditions. All experiments were conducted under deaerated conditions. The complex, AA-B, formed between ascorbic acid and sodium hydrogen orthophosphate (of the buffer) and reported earlier from our laboratory, played an important role in the production of the free radicals. The course of the polymerization reaction was followed by the measurements of rate of monomer disappearance -d[M]/dt (gravimetrically), rate of dye disappearance -d[D]/dt (spectrophotometrically), and the chainlengths n, of the polymer formed (viscometrically); light intensity, light wavelength, and concentrations of the dye, reducing agent, and monomer were the various variables for these measurements. A tentative scheme based on the excitation of the dye in the primary photochemical act and the interaction of the excited dye with the complex AA-B in the dark resulting in radicals (from ascorbic acid) which initiate vinyl polymerization is proposed, and the experimental results are found to conform to such a scheme. The values of various ratios of rate constants such as kp/kt½, kr/k7, ki/k6 were calculated and are discussed.
    Zusätzliches Material: 12 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1972.150100519
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  • 9
    Digitale Medien
    Digitale Medien
    Modification of gelatin with poly(ethyl acrylate) (1976)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 14 (1976), S. 507-510 
    Details
    ISSN: 0360-6376
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1976.170140221
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  • 10
    Digitale Medien
    Digitale Medien
    Graft copolymerization of methyl acrylate onto gelatin (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 16 (1978), S. 3287-3292 
    Details
    ISSN: 0360-6376
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1978.170161223
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