Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.791446
Title: Investigations into the synthetic modifications of terpenes for the synthesis of renewable polyesters
Author: Thomsett, Megan
ISNI:       0000 0004 8502 3016
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 2019
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Abstract:
This thesis details the synthesis of four novel terpene-derived monomers via the derivatisation of a-pinene and limonene (two of the most abundant terpenes). The monomers have been used in the synthesis of sustainable polyesters, which all contain a unique cyclohexane ring in their backbone. The functionalisation of limonene has enabled the synthesis of two renewably-sourced monomers for the formation of terpene derived polyesters. Three methods for the synthesis of a novel hydroxy-acid are reported and their green credentials scrutinised through comparison of their sustainability-metrics. Stepgrowth homo-polymerisation of the hydroxy-acid is demonstrated to yield a low molecular weight novel polyester with 100% of its carbon content originating from the terpene starting material. The corresponding limonene diol is shown to act as a comonomer with a renewable diacid. The resultant polyesters display impressive Mns of up to 30 kDa with Tgs between -6 and 24 oC. The degradation of these materials were shown to allow recyclability of the diol monomer. a-Pinene was used for the synthesis of two polyols, which served as comonomers with a renewable diacid, enabling the synthesis of two novel polyesters with high Tgs. The corresponding enantiomers of the a-pinene derived polymers were blended to form stereocomplexes, leading to improved thermal properties of the polyester.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.791446  DOI: Not available
Keywords: QD415 Biochemistry ; TP1080 Polymers and polymer manufacture
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