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  • 21
    Electronic Resource
    Electronic Resource
    Poly-α-ester degradation studies. VI. Thermal degradation of poly(3-pentylidene carboxylate) (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 18 (1980), S. 123-146 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The thermal degradation of poly(3-pentylidene carboxylate) has been studied kinetically over the temperature range 200-300°C using thermogravimetry, gas evolution analysis, and rheogoniometry together with isolation and analysis of the reaction products. The observed behavior is completely different from that previously reported for poly(isopropylidene carboxylate) and poly(methylene carboxylate). Whereas in the latter cases the decomposition occurs by a first-order intramolecular ester interchange process characterized by an activation energy in the region of 27 kcal mole-1, poly(3-pentylidene carboxylate) decomposition occurs by random chain scission superimposed on a first-order hydrogen abstraction process. The activation energy associated with this decomposition reaction is in the region of 47 kcal mole-1, and the major degradation products are cis- and trans-2-ethyl crotonic acid.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.170180113
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  • 22
    Electronic Resource
    Electronic Resource
    The Emulsifying and De-emulsifying Properties of Some Microbial Polysaccharides (1980)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 0 (1980), S. 21-25 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Zahlreiche mikrobielle Polysaccharide sind auf ihre Fäahigkeiten untersucht worden, Wasser- und ÖI-Emulsionen zu brechen oder aber zu stabilisieren.Negativ geladene schwach verzweigte o-Phosphonomannane mit einem relativ hohem Phosphorgehalt zeigen gute de-emulgierende Eigenschaften.Mannane stellen schlechte De-Emulgatoren dar, aber einige andere neutrale Polysaccharide erreichen fast so gute Werte wie die besten o-Phosphonomannane.Die untersuchten Polysaccharide können nicht als effektive Emulgatoren bezeichnet werden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370000005
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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