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Interaction of poly(methyl methacrylate) and manganese chloride
Author(s) -
Wilkie Charles A.,
Leone Joseph T.,
Mittleman Martin L.
Publication year - 1991
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1991.070420427
Subject(s) - monomer , thermogravimetric analysis , methyl methacrylate , polymer chemistry , manganese , methacrylate , solvent , polymer , materials science , chloride , dissolution , thermal decomposition , glycidyl methacrylate , polymerization , chemistry , organic chemistry
The thermal degradation of poly(methyl methacrylate) (PMMA), in the presence of manganese chloride has been studied by sealed tube reactions and thermogravimetric analysis coupled to FT‐IR spectroscopy. From sealed tube reactions it was found that the degree of mixing of the MnCl 2 and PMMA has an important effect on monomer formation. In systems where the two components are simply poured together, the amount of monomer is about half that observed for the thermolysis of PMMA alone; when the two components are thoroughly mixed by dissolution in solvent, the monomer yield fails to zero. The TGA–FT‐IR experiment on solvent mixed material does show the presence of monomer. In sealed tubes, monomer may not escape and must repolymerize, while in the TGA experiment the monomer is swept out before reaction may occur. Monomer production also commences at temperatures lower than those for degradation of PMMA alone. It is apparent that manganese chloride catalyzes both the degradation of polymer to monomer and the reoligomerization of this monomer. The gases that are produced include CO, CO 2 , CH 3 Cl, HCl, and CH 4 . A mechanism is proposed to account for all of these products and a manganese ionomer is the final product of the reaction.