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Kinetik der radikalischen polymerisation und copolymerisation von N-vinyl-N-methylacetamid

✍ Scribed by Fischer, Johannes Paul ;Rösinger, Sigurd

Publisher
Wiley (John Wiley & Sons)
Year
1983
Weight
299 KB
Volume
184
Category
Article
ISSN
0025-116X

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✦ Synopsis

In order to get information on the kinetics of free radical polymerization of N-vinyl-N-methylacetamide (VIMA) polymerizations of the purified monomer were performed in dilatometers using the temperature range from 25 to 70°C, monomer concentrations of 10 to 100% in methanol, and initiation either by y-irradiation or by radical initiators. Molecular weight measurements of the polymer were calibrated by light scattering determinations of M , according to the following equation at 30°C in methanol: [q]/(ml/g) = 5,02 * -M,$7946. Normal kinetics of free radical polymerization were found to be valid and Arrhenius parameters were calculated for the ratio k;/k, of the propagation rate constant kp and the termination rate constant kt as well as for the monomer transfer constant C , and for the efficiency of initiationf. For copolymerizations of N-vinyl-N-methylacetamide with different comonomers the mean Q-e-values were calculated as follows: QVIMA -036; eVIMA = -1,8.

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