Makarudze, Ivainesu (2020) Exploration of diene-dienophile pairs for Diels-Alder-based thermoreversible crosslinked polymers. Bachelor's Thesis, Chemical Engineering.
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Abstract
Depletion of natural resources has influenced the rise in demand of synthetic polymers. However, the use of these polymers, especially those that are difficult to recycle, is resulting in extensive pollution. Thermosets are such an example of widely used polymers, offering good mechanical properties, yet recycling them while maintaining these properties is near impossible. It is for this reason that the modification of thermosets is done to allow them to exhibit thermoreversibility, which is the cleavage and reconnection of crosslinks induced by heat. This allows them to be recycled or reworked, and is of great importance in the bid to make the earth more sustainable. In this thesis, the introduction of thermoreversibility to a thermosetting aliphatic polyketone through the addition of diene and dienophile pairs capable of the Diels-Alder reaction is studied. Thermoreversibly crosslinked polyketones based on the diene-dienophile pairs: furan-maleimide, cyclopentadiene-cyclopentadiene, anthracene-maleimide and fulvene-maleimide are the main focus. Their preparation is proposed to be done through addition of the diene functionality in steps, which include Paal-Knorr reaction of the polymeric backbone. Subsequently, crosslinking is carried out using the dienophile. Through literature-based rheological measurement predictions, it is found that the pairs exhibit thermoreversibility at different temperatures, with the fulvene- maleimide having the lowest range (-25°C to 65°C).
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Bose, R.K. and Orozco Gutierrez, F. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 24 Jun 2020 11:03 |
| Last Modified: | 24 Jun 2020 11:03 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/22112 |
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