Descripción
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The rate of hydrolysis of poly(e-caprolactam), in aqueous sulfuric acid as solvent and catalyst was studied at 343.2 K over the sulfuric acid concentration range of 4.0 to 14.0 M by considering as a measure of the hydrolysis the flow time measured by this viscometric technique. Hydrolysis rates were measured by two independent viscometer of 0.36 and 0.58 mm f ( capillary bore). Viscosity data have been analyzed by means of the relation between the macroscopic viscosity h and molecular weight M or number of hydrolyzable amide links (- NHCO-) considering that our macromolecule behaves either as a gaussian hydrodynamically permeable coil. The experimental results satisfy, even for high degrees of conversion, a first-order rate equation. Kinetic linear free energy linear relationships (LFERs) and Ho ( Hammett acidity function), HA ( amide acidity function) and aH2O ( water activity coefficient) functions are discussed. | |
Internacional
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Si |
Nombre congreso
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32nd Internacional Conference on Solution Chemistry |
Tipo de participación
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960 |
Lugar del congreso
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La Grande-Motte, Montpellier (Francia) |
Revisores
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Si |
ISBN o ISSN
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DOI
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Fecha inicio congreso
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28/08/2011 |
Fecha fin congreso
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02/09/2011 |
Desde la página
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120 |
Hasta la página
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121 |
Título de las actas
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Book of abstracts |