Meindertsma, Michiel (2020) Reprocessability of self-healing polymer coatings based on Diels-Alder thermo-reversible chemistry. Bachelor's Thesis, Chemical Engineering.
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Abstract
We investigated reprocessability of self-healing thermosetting polymer coatings based on furan-grafted polyketones crosslinked with bis-maleimide. Mixtures of furan-grafted polyketones and bis-maleimide were prepared and spin coated onto glass plates. The coated glass plates were submerged into anthracene-solvent mixtures and the solutions underwent different thermal treatments (25, 50, 75, 100 and 120 ⁰C) for 32h. During thermal treatment, UV-vis spectroscopy was used to follow furan-grafted polymer solubilization at different time intervals. It followed that all of the investigated solvents were able to solubilize (part of) the self-healing polymeric coating at different temperatures. At lower temperatures (25, 50 and 75 ⁰C), the solubility/miscibility between the furan-grafted polymer and the apparent solvent appeared to be decisive in determining the order of solubilization for the examined solvents. At higher temperatures (100 and 120 ᵒC), the reverse Diels-Alder reaction occurred to a larger extent. This diminished the thermosetting polymer network, thus increasing solubilization of furan-grafted polyketones for all solvents. It appeared that, at these higher temperatures, the relative solubility (estimated based on Hansen Solubility Parameters) of the solvents and furan-grafted polyketones was no longer decisive for the observed order of polymer solubilization.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Picchioni, F. and Orozco Gutierrez, F. and Bose, R.K. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 24 Jun 2020 11:07 |
| Last Modified: | 24 Jun 2020 11:07 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/22103 |
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