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Synthesis and characterization of polymers bearing pyrazole groups, 1. Methacrylic derivatives
Author(s) -
Boutevin Bernard,
GuidaPietrasanta Francine,
Malek Fouad
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950402
Subject(s) - copolymer , polymer chemistry , styrene , monomer , pyridine , pyrazole , chemistry , glass transition , thermal stability , polymer , methacrylic acid , thermal decomposition , organic chemistry
The synthesis of new methacrylic monomers H 2 CC(CH 3 )COOCH 2 G where G is a pyridine, a pyrazole or a bipyrazole group has been achieved. Their homopolymerization was studied and gave fairly low molecular mass polymers. Their copolymerization with styrene gave copolymers tending to be alternating when the bulkiness of group G increased. Moreover, in the presence of Lewis acids the monomers were complexed. With ZnCl 2 , they were complexed through nitrogen atoms and were shown to be inactive in copolymerization. With SnCl 4 , they were complexed through the carbonyl group and gave alternating copolymers. The homopolymers exhibited low glass transition temperatures (50–76°C) and moderate thermal stability (decomposition begins at ca. 200–280°C and is complete at 550°C). In the copolymers with styrene the thermal properties showed to be improved.