ISSN:
0025-116X
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
Kinetic parameters, obtained isothermally, have been used in the quantitative description of the polymerisation of acrylamide under virtually adiabatic conditions. The equations which have been derived relate the temperature rise on reaction to the decrease in reactant concentration during the course of reaction, taking account of the various energies of activation and frequency factors involved, whose values may be chosen as required. The approach used has been to find the value of the overall activation energy which gives the best agreement between theoretical and experimental temperature-time plots. Good agreement has been obtained between these when a value of 74,5 ± 0,9 kJ · mol-1 was chosen for the overall activation energy for the persulfate-initiated polymerisation of acrylamide using a wide range of initiator and monomer concentrations. This gives a value of 135,5 kJ · mol-1 for the activation energy for the thermal decomposition of the persulfate ion, which is in good agreement with the literature. Interesting implications are discussed in the context of the nature of the product formed during the course of the polymerisation.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/macp.1983.021840914
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