Floyd, Lauren, E (2019) Reworkability of Covalently Adaptable Networks - Linking Dynamics to Diels-Alder Chemistry Through Infrared Spectroscopy. Bachelor's Thesis, Chemical Engineering.
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Abstract
The thermoreversibility of covalently adaptable networks consisting of furan-functionalised polyketones crosslinked with 1,1’-(methylene-di-1,4-phenylene)bis-maleimide have been explored. Analysis of the thermoreversibility of each polymer was investigated through Fourier-transform infrared spectroscopy and the relevant bands were explored at two different temperatures. The results of the in-situ heating and cooling of the polymer using the attached heating equipment of the spectrometer showed expected trends for the signal of the Diels-Alder adduct, with a lower amount of adduct at the decoupling temperature. These same trends were observed for both furan and maleimide; thus contradicting what was expected since more free furan and maleimide moieties should be present at the adduct de-coupling temperature. A control experiment with non-crosslinked furan grafted polyketones was carried out which showed the same trend, suggesting results from the initial experiment could be artefacts of the temperature. Characterisation after ex-situ heating and cooling of the polymer in two separate ovens didn’t show any significant changes which suggests that the thermoreversibility is based on shifting the crosslinking points at higher temperatures.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Orozco Gutierrez, F. and Picchioni, F. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 14 Feb 2020 15:30 |
| Last Modified: | 14 Feb 2020 15:30 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/21384 |
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