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Dependence of copolymer sequencing based on lactone ring size and ε-substitution
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Wilson, James A. (James Andrew), Hopkins, S. A., Wright, P. M. and Dove, Andrew P. (2016) Dependence of copolymer sequencing based on lactone ring size and ε-substitution. ACS Macro Letters, 5 (3). pp. 346-350. doi:10.1021/acsmacrolett.5b00940 ISSN 2161-1653.
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Official URL: http://dx.doi.org/10.1021/acsmacrolett.5b00940
Abstract
The copolymerization of an ε-substituted ε-lactone, menthide (MI), and a range of nonsubstituted lactones (6-, 7-, 8-, and 9-membered rings) was investigated in order to determine the factors that affect the sequencing of the MI copolymers. Analysis by quantitative 13C NMR spectroscopy showed the copolymerization of MI with a nonsubstituted lactone of ring size 7 or less produced a randomly sequenced copolymer, as a consequence of the smaller lactone polymerizing first and undergoing rapid transesterification as MI was incorporated. Conversely, copolymerization with larger ring lactones (ring size 8 and above) produced block-like copolymers as a consequence of MI polymerizing initially, which does not undergo rapid transesterification side reactions during the incorporation of the second monomer. Terpolymerizations of a small ring lactone, macrolactone, and menthide demonstrated methods of producing lactone terpolymers with different final sequences, depending on when the small ring lactone was injected into the reaction mixture.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QD Chemistry | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
| Library of Congress Subject Headings (LCSH): | Copolymers, Lactones, Ring-opening polymerization | ||||||||
| Journal or Publication Title: | ACS Macro Letters | ||||||||
| Publisher: | American Chemical Society | ||||||||
| ISSN: | 2161-1653 | ||||||||
| Official Date: | 15 March 2016 | ||||||||
| Dates: |
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| Volume: | 5 | ||||||||
| Number: | 3 | ||||||||
| Number of Pages: | 5 | ||||||||
| Page Range: | pp. 346-350 | ||||||||
| DOI: | 10.1021/acsmacrolett.5b00940 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 23 June 2016 | ||||||||
| Date of first compliant Open Access: | 23 June 2016 | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Infineum UK, Royal Society (Great Britain) |
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