Controlled radical copolymerization of N-vinylpyrrolidone with 1,1,1,3,3,3-hexafluoroisopropyl-α-fluoroacrylate

Conformations of Alternating Partially Fluorinated Copolymers in Dilute Ethanol Solutions

“…Low reactivity ratio r ¼ r 1 Â r 2 ¼ 0.017 Â 0.027 indicates that RAFT copolymers must be highly alternating. [12] As VP is a strong electron-donor monomer with a high electron density double bond, and FPFA is a strong electron-acceptor monomer with a low electron density double bond, these monomers polymerize spontaneously in an alternating mode even by common radical (RAD) polymerization with reactivity ratios r 1 ¼ 0.155, r 2 ¼ 0.…”

“…The molecular masses were determined by GPC in a previous study. [12] Linear poly(methyl methacrylate) (PMMA) standards were used [12] . b Ratio of the weight-average molecular mass (M w ) to the number-average molecular mass (M n ).…”

“…[12] The monomers were dissolved in tetrahydrofurane. Benziltyhiobenzoate was used as a RAFT agent, 2,2-azobis(isobutyronitrile) was used as an initiator.…”

“…The copolymers were obtained by reversible addition-fragmentation chain transfer (RAFT) polymerization, successfully applied in the synthesis of various narrowly dispersed alternating copolymers. [7][8][9][10][11][12] We performed the conformational analysis of poly(VP-FPFA), basing primarily on the Burchard factor (the structure-sensitive dimensionless ratio R g =R h ). [13] The article is organized as follows.…”

Simultaneous Control over Monomer Sequence and Molecular Weight Using the RAFT Process

“…Many other monomer pairs also polymerize in an alternating fashion, such as N-vinylnaphthalimide (50) or N-vinyl phthalimide (51) with N-isopropyl acrylamide, the copolymerization of which could effectively be controlled using a dithiocarbamate-type CTA, or of N-VP with 1,1,1,3,3,3-hexafluoroisopropyl-α-fluoroacrylate (52).…”