Evaluation of methods used for analysing maleic anhydride grafted onto polypropylene by reactive processing

Grafting of maleic anhydride onto polypropylene, in the presence of peroxides, was performed through reactive processing. The samples obtained were submitted to several analyses in order to check for conversion of the acid groups to anhydrides and whether purification was necessary. Quantification o...

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Bibliographic Details
Published in:Polymer testing 2000-01, Vol.19 (1), p.3-15
Main Authors: Bettini, S.H.P, Agnelli, J.A.M
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:Grafting of maleic anhydride onto polypropylene, in the presence of peroxides, was performed through reactive processing. The samples obtained were submitted to several analyses in order to check for conversion of the acid groups to anhydrides and whether purification was necessary. Quantification of reacted maleic anhydride was tested by titration of acid groups and Fourier transform infrared spectroscopy (FTIR). It was concluded that each type of processing requires verification of the necessity to purify the samples for removal of residual maleic anhydride. Spectroscopy was shown to be better for the quantification of reacted maleic anhydride, as long as the samples are submitted to thermal treatment at 130°C for at least 24 h.
ISSN:0142-9418
1873-2348
DOI:10.1016/S0142-9418(98)00066-X