Synthesis, isolation, and thermal behavior of polybutadiene grafted with poly(2,3,4,5,6-pentafluorostyrene)

Citation data:

Journal of Polymer Science, Part A: Polymer Chemistry, ISSN: 0887-624X, Vol: 43, Issue: 13, Page: 2874-2891

Publication Year:
2005
Usage 11
Abstract Views 11
Captures 7
Readers 7
Citations 13
Citation Indexes 13
Repository URL:
http://ideaexchange.uakron.edu/polymerscience_ideas/257; https://works.bepress.com/coleen_pugh/18
DOI:
10.1002/pola.20765
Author(s):
Paz-Pazos, Marta; Pugh, Coleen
Publisher(s):
Wiley
Tags:
Materials Science; Chemistry; glass transition; graft copolymerization; grafting efficiency; grafting frequency; grafting ratio; phase separation; polybutadiene; poly(pentafluorostyrene); radical copolymerization; Chemical Engineering; Engineering; Polymer Science
article description
2,3,4,5,6-Pentafluorostyrene (PFS) was copolymerized with polybutadiene (PB) in tetrahydrofuran using benzoyl peroxide as the initiator at 50, 60, and 80°C. The copolymerizations follow typical radical polymerization kinetics and behavior. The grafting parameters were evaluated as a function of monomer conversion, initiator concentration, and/or temperature by gel permeation chromatography of directly injected copolymerization mixtures. The grafting efficiencies and grafting ratios are most consistent with a system that terminates by combination and whose graft sites are generated by hydrogen abstraction of allylic radicals by primary initiator radicals. Pure graft copolymers were isolated by extracting unreacted PB into hexanes and PPFS homopolymer into acetone. The similarity of the glass transition temperatures of the PPFS grafts and the corresponding extracted PPFS homopolymers confirms that their lengths are approximately equal. © 2005 Wiley Periodicals, Inc.