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  • 1
    Digitale Medien
    Digitale Medien
    Solventless transesterification of methyl methacrylate with ethylene glycol. A kinetic approach (1992)
    Springer
    Reaction kinetics and catalysis letters 48 (1992), S. 217-224 
    Details
    ISSN: 1588-2837
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Abstract С целью определения оптималQjных условий синтеза гидроксиэтилметакрилата изучена кинетика переэтерификации метилметакрилата этиленгликолем в массе. Представленные кинетические данные свидетельствуют о сильной зависимости кинетических параметров от исходного соотношения реагентов.
    Notizen: Abstract The kinetics of solventless transesterification of methyl methacrylate with ethylene glycol has been studied to establish the optimal conditions for ethylene glycol monomethacrylate synthesis. The kinetic data presented show strong dependence of kinetic parameters on initial reagents ratio.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02070088
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  • 2
    Digitale Medien
    Digitale Medien
    The effect of solvents and polyethylene glycol on the synthesis of linear and cyclic poly(methylene sulfide) (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 34 (1996), S. 1083-1085 
    Details
    ISSN: 0887-624X
    Schlagwort(e): poly(metyhylene sulfide) ; condensation polymerization ; catalysis ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The condensation polymerization of sodium sulfide with methylene chloride in various solvents was studied in order to assess the influence of polarity on the yield and composition of condensation products. The effect of addition of polyethylene glycol was also studied. It has been found that the overall yield of polythiomethylenes rises from 13.9% in methanol to 85.2% (methanol, PEG15000). The use of solvents of higher polarity promotes the linear oligomers, whereas in methanol the cyclic products predominate. In presence of PEG the this equilibrium is shifted towards tetrathiane. The observed phenomena are discussed in terms of solvents polarity and reaction media viscosity. © 1996 John Wiley & Sons, Inc.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    A study of condensation of trithiane hexaoxide with formaldehyde (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 1161-1164 
    Details
    ISSN: 0887-624X
    Schlagwort(e): condensation ; trithiane hexaoxide ; formaldehyde ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The title reaction catalyzed by NaOH in aqueous media was studied. The oligomeric products formed are characterized in terms of their yield, structure, etc. The effects of reaction parameters and media are also discussed. The reaction mechanism is proposed. © 1993 John Wiley & Sons, Inc.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1993.080310510
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  • 4
    Digitale Medien
    Digitale Medien
    A study of the cationic solid-state polymerization of 1,3,5-trithiane (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 2233-2240 
    Details
    ISSN: 0360-6376
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The effect of various reaction parameters, such as temperature, catalyst, and concentration, on the cationic-initiated polymerization of 1,3,5-trithiane in solid state was studied and the apparent activation energies were estimated. A simple mathematical formula to describe the observed kinetic curves is proposed. The features observed are interpreted in terms of disordering a crystal structure during polymerization.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1979.170170730
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