Thermally self-healing polymeric materials Based on Diels-Alder and retro Diels-Alder model reaction

Halteren A.H. van (2012) Thermally self-healing polymeric materials Based on Diels-Alder and retro Diels-Alder model reaction. Master's Thesis / Essay, Chemistry.

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Abstract

Estimations suggest a worldwide production of plastics of more than 300 million tons per year. These include thermoplastic polymers and thermoset polymers. Almost all polymer material which is produced in the world, is waste that is going to landfills or is being reused in relatively expensive ways. These numbers are an indication of what the potential of success is for a polymer with the material properties of a thermoset polymer and can guarantee 100% recyclability. Reason enough to develop a new method. A new method is already discussed in the thesis of Zhang. That research will be continued in this topic: thermally self-healing materials based on Diels-Alder and retro-Diels-Alder model reactions. To study this system, model compounds with furan groups and different maleimide groups have been synthesized and these have been cross-linked. The used maleimides were: ethyl-, cyclohexyl-, phenyl- and benzyl maleimide. After making pyrrolic furan, a reaction between a furan- and a Reactions were performed in NMR-tudes and the conversions were determined with H-NMR spectroscopy. Subsequently, when the right parameters were determined, a batch reaction was made of pyrrolic furan and ethyl maleimide. The obtained product was studiet with H-NMr spectroscopy and the conversion was determined. The fractions in the batch were sperarated by column chromatography. The products consists an endo and an exo adduct. These fractions were studied by H-NMR spectroscopy and DSC. Finally hyperchem calculations were performed in order to calculate the diene and dienophile. Also the free energy and the energy cap (dE) was calculated.

Item Type:	Thesis (Master's Thesis / Essay)
Degree programme:	Chemistry
Thesis type:	Master's Thesis / Essay
Language:	English
Date Deposited:	15 Feb 2018 07:50
Last Modified:	15 Feb 2018 07:50
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/10486

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