Hungenberg, Klaus Dieter; Bandermann, Friedhelm:
Study of the nature of radical polymerization of methyl methacrylate with \"aged\" chromium(II) acetate/benzoyl peroxide.
1983
In: Makromolekulare Chemie (Makromol.Chem.), Jg. 184 (1983), Heft 7, S. 1423 - 1439
Artikel/Aufsatz in Zeitschrift / Fach: Chemie
Titel:
Study of the nature of radical polymerization of methyl methacrylate with \"aged\" chromium(II) acetate/benzoyl peroxide.
Autor(in):
Hungenberg, Klaus Dieter; Bandermann, Friedhelm im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen
Erscheinungsjahr
1983
Erschienen in:
Makromolekulare Chemie (Makromol.Chem.), Jg. 184 (1983), Heft 7, S. 1423 - 1439
ISSN

Abstract:

The polymn. of Me methacrylate (I) [80-62-6] in DMF with aged Cr(OAc)2 (II) [628-52-4] and Bz2O2 (III) [94-36-0], previously formulated as a living radical polymn., was investigated. The reaction between II and III gives besides N-methylformamidomethyl benzoate the N-methylformamidomethylchromium(III) cation as an intermediate, which itself may react with III to form addnl. free radicals at a rate faster than that of III thermolysis. Thus, the polymn. of I in this system could be a normal radical one with free and uncomplexed radicals. The increase of the d.p. with aging and monomer conversion is explained by the decreasing rate of the radical forming reactions and the onset of the gel effect.