An investigation of the nitroxide-mediated preirradiation grafting of styrene onto PFA

Dargaville, T. R., George, G. A., Hill, D. J. T. and Whittaker, A. K. (2004) An investigation of the nitroxide-mediated preirradiation grafting of styrene onto PFA. Macromolecules, 37 2: 360-366. doi:10.1021/ma0302208


Author Dargaville, T. R.
George, G. A.
Hill, D. J. T.
Whittaker, A. K.
Title An investigation of the nitroxide-mediated preirradiation grafting of styrene onto PFA
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
Publication date 2004
Sub-type Article (original research)
DOI 10.1021/ma0302208
Volume 37
Issue 2
Start page 360
End page 366
Total pages 7
Place of publication Washington
Publisher American Chemical Society
Collection year 2004
Language eng
Subject C1
250502 Physical Chemistry of Macromolecules
780103 Chemical sciences
Abstract Simultaneous and preirradiation grafting of styrene onto fluorinated polyolefins does not enable control of the molecular weights or polydispersities of the styrene grafts. The nitroxide-mediated grafting of styrene onto PFA with TEMPO and TEISO using a preirradiation method has been investigated as a means of controlling the graft properties and especially to produce grafts with improved suitability for SPOC. The yields of graft were found to be in the range 15-20% for nitroxide concentrations between 5 x 10(-3) and 2 x 10(-2) M and were similar for the two nitroxides studied. Raman mapping was used to obtain the depth profile for the styrene grafts. The grafts were found to be principally located within the PFA substrate, and little graft was formed at the PFA surface. Fmoc loading tests were performed to assess the suitability of the grafted PFA as a support for SPOC, but these showed no significant loading was achieved, thus indicating that the graft properties are not suitable for SPOC. However, the study has important implications for the applications of PFA-grafted polymers in other areas, such as chemically resistant ion-exchange and separation membranes.
Keyword Polymer Science
Free-radical Polymerizations
Fragmentation Chain Transfer
Electron-spin-resonance
Narrow Polydispersity
Resins
Alkoxyamine
Mechanism
Membranes
Supports
Raft
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 04:14:21 EST