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  • 1
    Electronic Resource
    Electronic Resource
    Complete Spectral Assignments and Microstructures of Photopolymerized Acrylonitrile/Methacrylic Acid Copolymers by NMR Spectroscopy (1995)
    s.l. : American Chemical Society
    Macromolecules 28 (1995), S. 8735-8741 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00130a005
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  • 2
    Electronic Resource
    Electronic Resource
    Methyl methacrylate-n-butyl methacrylate copolymer containing ferric chloride: Mössbauer study (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 136 (1989), S. 169-175 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Methyl methacrylate /MMA/-n-butyl methacrylate /nBuMA/ copolymer containing anhydrous ferric chloride was prepared by free radical polymerization at 70 °C. TGA studies showed that the addition of ferric chloride increases the thermal stability of copolymer by 90 °C. Mössbauer studies of the copolymer were carried out to determine the oxidation state and environments of iron in the copolymer. Mössbauer studies of the copolymer heated at 150 °C, 300 °C and 500 °C for 1 h showed that during the thermal degradation, no reduction of Fe3+ takes place.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164115
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  • 3
    Electronic Resource
    Electronic Resource
    Mössbauer studies of polyethyl methacrylate containing ferric chloride as a stabilizer (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 144 (1990), S. 135-144 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Polyethyl methacrylate /PEMA/ containing ferric chloride was prepared by free radical polymerization at 70°C. Mössbauer studies of the polymer heated at 150°C, 300°C and 500°C for 1 h showed that during the thermal degradation the Fe3+ species are reduced to Fe2+ and the final form is α-Fe2O3. TGA studies showed that the addition of ferric chloride during the polymerization of ethyl methacrylate increased the thermal stability of PEMA by 40°C. The final decomposition temperature /FDT/ increased by 75°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02162196
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  • 4
    Electronic Resource
    Electronic Resource
    13C-NMR studies of compositional and configurational sequence distribution in acrylonitrile-ethyl methacrylate copolymers (1991)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 29 (1991), S. 479-487 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Acrylonitrile-ethyl methacrylate (A/E) copolymers of different monomer concentrations were prepared in bulk by free radical initiation. Copolymer composition was determined by nitrogen analysis and the comonomer reactivity ratios were determined by the method of Kelen-Tüdos. 13C-NMR spectra of several acrylonitrile/ethyl methacrylate copolymers are discussed in terms of their triad monomer sequence and cotacticity. Terminal and penultimate reactivity ratios have been calculated using the observed monomer triad sequence distribution determined from 13C-NMR spectroscopy for individual samples. Triad sequence distribution was used to calculate dyad concentrations, probability parameters, number average sequence lengths, and the comonomer mole fractions in the copolymers. The configurational sequence distributions in terms of all the 10 A-centered and 10 E-centered triad cotactic sequences have been determined and found to be in excellent agreement with those obtained using various cotactic probability parameters.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1991.080290404
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  • 5
    Electronic Resource
    Electronic Resource
    Mössbauer studies of ferric chloride containing ethyl methacrylate-n-butyl methacrylate copolymer (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 41 (1990), S. 2031-2038 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Ethyl methacrylate(EMA)-n-butyl methacrylate (nBuMA) copolymer containing anhydrous ferric chloride was prepared by free radical polymerization at 70°C. TGA studies show that the addition of ferric chloride increases the thermal stability of the copolymer. Mössbauer studies of the copolymers showed the presence of Fe3+ species only. Mössbauer studies of the copolymer heated at 150°C, 250°C, and 500°C for 1 h showed that during the thermal degradation, Fe3+ species are reduced to Fe2+ and then finally α-Fe2O3 is formed. The mechanism of thermal degradation has been proposed on the basis of IR, TGA, and Mössbauer studies.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1990.070410909
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  • 6
    Electronic Resource
    Electronic Resource
    Mössbauer studies of solid state decomposition of methyl methacrylate-ethyl methacrylate copolymers containing ferric chloride (1990)
    Springer
    Hyperfine interactions 56 (1990), S. 1695-1699 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Methyl methacrylate (MMA)-ethyl methacrylate (EMA) copolymers of different monomer concentrations containing anhydrous ferric chloride were prepared by bulk polymerization at 70°C. TGA studies showed that inclusion of iron salt increases the thermal stability of copolymers by 50°C. Mössbauer spectra of copolymers heated at different temperatures showed the presence of Fe3+ species only, in different environments. The mechanism of thermal stabilization of copolymer has been proposed on the basis of IR, TGA and Mössbauer spectroscopy studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405497
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  • 7
    Electronic Resource
    Electronic Resource
    Sequence determination in vinyl acetate/alkyl methacrylate copolymers prepared by semicontinuous batch process by NMR spectroscopy (1992)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 1773-1781 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Two series of copolymers, vinyl acetate/ethyl methacrylate (V/E) and vinyl acetate/butyl metha-acrylate (V/B) copolymers, were prepared by free-radical-initiated emulsion copolymerization using a semicontinuous batch process. Copolymer compositions determined from 1H NMR spectroscopy were found to be in good agreement with those expected theoretically. The carbonyl and quaternary carbon resonances in 13{1H} NMR spectra were assigned to different alkyl methacrylate-centered triad sequences by observing the changes in intensities of the resonances with copolymer composition and were used for calculating alkyl methacrylate-centered triad fractions. The resonances giving information regarding the V-centered triads were not properly resolved.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1992.021930721
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  • 8
    Electronic Resource
    Electronic Resource
    Mössbauer studies of iron stabilised polymethacrylates (1989)
    Springer
    Hyperfine interactions 45 (1989), S. 323-329 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Polymethyl methacrylate (PMMA), polyethyl methacrylate (PEMA) and polybutyl methacrylate (PBuMA) containing ferric chloride and ferrous sulphate as stabilisers, were prepared by free radical polymerization. Mössbauer spactra of ferrous sulphate stabilised polymers don't show any change in the value of isomer shift (1.30 mm/s) while quadrupole splitting values are quite different from those for pure ferrous sulphate. This indicates that environment of Fe2+ moiety changes in polymers and thus stabilises the polymers. In case of ferric chloride stabilised polymers the isomer shift values don't differ significantly for different polymethacrylates but quadrupole splitting values increase from polymethyl methacrylate to polybutyl methacrylate. The TGA analysis shows that the inclusion of iron salts stabilises the polymers by 40°C (approx.) and at higher temperatures α-Fe2O3 is formed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405895
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  • 9
    Electronic Resource
    Electronic Resource
    Mössbauer studies of acrylonitrile/alkyl methacrylate copolymers doped with ferric chloride (1990)
    Springer
    Hyperfine interactions 62 (1990), S. 229-236 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Acrylonitrile/methyl methacrylate (A/M), acrylonitrile/ethyl methacrylate (A/E) and acrylonitrile/n-butyl methacrylate (A/B) copolymers containing ferric chloride were prepared by free radical bulk polymerization. TGA studies show that the addition of ferric chloride increases the thermal stability of these copolymers. Mössbauer studies of the copolymers showed the presence of Fe3+ species only. Mössbauer spectra of the copolymer heated at 200°C, 350°C and 500°C did not show a reduction of the Fe3+ species, and α-Fe2O3 was the final product formed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397703
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  • 10
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    Complete Spectral Assignments and Microstructures of Photopolymerized Acrylonitrile/Methacrylic Acid Copolymers by NMR Spectroscopy (1995)
    American Chemical Society
    Details
    Publication Date: 1995-12-01
    Print ISSN: 0024-9297
    Electronic ISSN: 1520-5835
    Topics: Chemistry and Pharmacology , Physics
    Published by American Chemical Society
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