Polymer Science Faculty Research

Title

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

Document Type

Article

Publication Date

5-24-2005

Abstract

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.

Publication Title

Journal of Polymer Science Part A: Polymer Chemistry

Volume

43

Issue

13

First Page

2874

Last Page

2891