Radical copolymerisation of chlorotrifluoroethylene with isobutyl vinyl ether initiated by the persistent perfluoro-3-ethyl-2,4-dimethyl-3-pentyl radical
dc.contributor.author | Puts, Gerard Jacob | |
dc.contributor.author | Lopez, Gerald | |
dc.contributor.author | Ono, Taizo | |
dc.contributor.author | Crouse, Philippus L. | |
dc.contributor.author | Ameduri, Bruno M. | |
dc.date.accessioned | 2015-06-25T08:41:38Z | |
dc.date.available | 2015-06-25T08:41:38Z | |
dc.date.issued | 2015 | |
dc.description.abstract | Results of the radical copolymerisation of chlorotrifluoroethylene (CTFE) with isobutyl vinyl ether (iBuVE) initiated by ∙CF3 radicals generated by β-scission of perfluoro-3-ethyl-2,4-dimethyl-3-pentyl radical (PPFR) at 90 °C in a batch reactor are reported. 19F NMR spectroscopy enabled the assessment of the molecular weights of the poly(CTFE-alt-iBuVE) copolymer by end-group analysis. It was found that, at low initiator concentrations (≤ 10 mol%), the ∙CF3 radicals preferably attack the vinyl ether monomer to initiate chain propagation and produce alternating poly(CTFE-alt-iBuVE) copolymers. At initiator ratios of 20 mol%, 19F NMR signals in the CF3 region other than the expected CH2-CF3 are observed and are attributed to ∙CF3 addition patterns due to kinetic effects brought on by monomer solubility. The molecular weights for the copolymer produced from 1%, 5%, and 10% PPFR were found to be 340 000, 237 000 and 122 000 g∙mol-1, respectively. The copolymer produced from 20% PPFR was oligomeric in nature with a molecular weight of 18 000 g∙mol-1. | en_ZA |
dc.description.embargo | 2016-05-30 | en_ZA |
dc.description.librarian | hb2015 | en_ZA |
dc.description.sponsorship | National Research Foundation of South Africa, CNRS, France and the south African Department of Science and Technology’s Fluorochemical Expansion Initiative. | en_ZA |
dc.description.uri | http://www.rsc.orgadvances | en_ZA |
dc.identifier.citation | Puts, GJ, Lopez, G, Ono, T, Crouse, PL & Ameduri, BM 2015, 'Radical copolymerisation of chlorotrifluoroethylene with isobutyl vinyl ether initiated by the persistent perfluoro-3-ethyl-2,4-dimethyl-3-pentyl radical', RSC Advances, vol. 5, no. 52, pp. 41544-41554. | en_ZA |
dc.identifier.issn | 2046-2069 | |
dc.identifier.other | 10.1039/C5RA05066A | |
dc.identifier.uri | http://hdl.handle.net/2263/45779 | |
dc.language.iso | en | en_ZA |
dc.publisher | Royal Society of Chemistry | en_ZA |
dc.rights | © The Royal Society of Chemistry 2015 | en_ZA |
dc.subject | Radical copolymerisation | en_ZA |
dc.subject | Batch reactor | en_ZA |
dc.subject | Molecular weights | en_ZA |
dc.subject | Chlorotrifluoroethylene (CTFE) | en_ZA |
dc.subject | Isobutyl vinyl ether (iBuVE) | en_ZA |
dc.title | Radical copolymerisation of chlorotrifluoroethylene with isobutyl vinyl ether initiated by the persistent perfluoro-3-ethyl-2,4-dimethyl-3-pentyl radical | en_ZA |
dc.type | Postprint Article | en_ZA |