Radical copolymerisation of chlorotrifluoroethylene with isobutyl vinyl ether initiated by the persistent perfluoro-3-ethyl-2,4-dimethyl-3-pentyl radical

dc.contributor.authorPuts, Gerard Jacob
dc.contributor.authorLopez, Gerald
dc.contributor.authorOno, Taizo
dc.contributor.authorCrouse, Philippus L.
dc.contributor.authorAmeduri, Bruno M.
dc.date.accessioned2015-06-25T08:41:38Z
dc.date.available2015-06-25T08:41:38Z
dc.date.issued2015
dc.description.abstractResults 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.embargo2016-05-30en_ZA
dc.description.librarianhb2015en_ZA
dc.description.sponsorshipNational Research Foundation of South Africa, CNRS, France and the south African Department of Science and Technology’s Fluorochemical Expansion Initiative.en_ZA
dc.description.urihttp://www.rsc.orgadvancesen_ZA
dc.identifier.citationPuts, 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.issn2046-2069
dc.identifier.other10.1039/C5RA05066A
dc.identifier.urihttp://hdl.handle.net/2263/45779
dc.language.isoenen_ZA
dc.publisherRoyal Society of Chemistryen_ZA
dc.rights© The Royal Society of Chemistry 2015en_ZA
dc.subjectRadical copolymerisationen_ZA
dc.subjectBatch reactoren_ZA
dc.subjectMolecular weightsen_ZA
dc.subjectChlorotrifluoroethylene (CTFE)en_ZA
dc.subjectIsobutyl vinyl ether (iBuVE)en_ZA
dc.titleRadical copolymerisation of chlorotrifluoroethylene with isobutyl vinyl ether initiated by the persistent perfluoro-3-ethyl-2,4-dimethyl-3-pentyl radicalen_ZA
dc.typePostprint Articleen_ZA

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Puts_Radical_2015.pdf
Size:
1.35 MB
Format:
Adobe Portable Document Format
Description:
Postprint Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description: