Quantification of the maleic anhydride grafted onto polypropylene by chemical and viscosimetric titrations, and FTIR spectroscopy
(2000) Polymer — Vol. 41, n° 6, p. 1989-1999 (2000)
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- Abstract
- An acid-base titration method for an accurate and reproducible quantification of maleic anhydride grafted onto polyolefins is proposed. The use of an organic base (tetra-butylammonium hydroxide) enhances the base solubility in organic solvents and prevents phenomena like coarcervation. The titration goes on until the visual endpoint of a coloured indicator, corresponding to the neutralisation of the grafted functions. Bromothymol blue is chosen as the coloured indicator to determine this equivalence point. It is critically correlated with a Fourier transform-infrared spectroscopy quantification developed previously by De Roovers et al. [J Polym Sci, Part A: Polym Chem 1995;33:829] and with a viscosimetric titration method here-proposed Finally, the titration mechanism is confirmed by the titration of some well-defined amount of anhydride model compounds and by FTIR analyses of their products after titration. (C) 1999 Elsevier Science Ltd. All rights reserved.
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Citations
Sclavons, M., Legras, R., Franquinet, P., Carlier, V., Verfaillie, G., Fallais, I., Laurent, M., & Thyrion, FC. (2000). Quantification of the maleic anhydride grafted onto polypropylene by chemical and viscosimetric titrations, and FTIR spectroscopy. Polymer, 41(6), 1989-1999. https://doi.org/10.1016/S0032-3861(99)00377-8 (Original work published 2000)