Study of the microstructure and thermal properties of tetrafluoroethylene–propylene elastomers

Tetrafluoroethylene–propylene elastomers containing from 41 to 53 mol% tetrafluoroethylene were prepared by emulsion copolymerization in batch operation, initiated by a redox system with tert-butylperoxybenzoate. Alternating copolymers in a wide range of monomer compositions were obtained. The compo...

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Bibliographic Details
Published in:European polymer journal 1999-04, Vol.35 (4), p.743-749
Main Authors: Kostov, G, Bessiere, J.M, Guida-Pietrasanta, F, Bauduin, G, Petrov, P
Format: Article
Language:English
Subjects:
Applied sciences
Copolymerization
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Tetrafluoroethylene–propylene elastomers containing from 41 to 53 mol% tetrafluoroethylene were prepared by emulsion copolymerization in batch operation, initiated by a redox system with tert-butylperoxybenzoate. Alternating copolymers in a wide range of monomer compositions were obtained. The composition curve has one azeotropic point at 46.7 mol% tetrafluoroethylene. The reactivity ratio calculated from NMR and elemental analysis was found to be r TFE=0.014 and r P=0.18. Highly alternating structures of the copolymers synthesized were proved. Copolymer compositions calculated from NMR spectra correspond to those obtained by elemental analysis. The thermal properties were measured by DSC and TGA and discussed in connection with the copolymer structure.
ISSN:0014-3057
1873-1945
DOI:10.1016/S0014-3057(98)00177-3