Syntheses of 2-(trifluoromethyl)acrylate-containing block copolymers via RAFT polymerization using a universal chain transfer agent. Issue 25 (13th June 2018)

• Record Type: Journal Article
• Authors: Banerjee, Sanjib; Guerre, Marc; Améduri, Bruno; Ladmiral, Vincent
• Is Part Of: Polymer chemistry. Volume 9:Issue 25(2018)
• Page Start: 3511
• Page End: 3521
• Publication Date: 2018-06-13
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/c8py00655e
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : 2-(Trifluoromethyl)acrylate-containing block copolymers were synthesized via RAFT polymerization using a universal CTA. Abstract : This article describes the synthesis and characterization of a series of well-defined block copolymers (BCPs) comprising a poly(vinyl acetate- alt-tert -butyl-2-trifluoromethacrylate) (poly(VAc- alt -MAF-TBE)) alternating copolymer segment and a homopolymer segment (PVAc, polystyrene, poly(meth)acrylate, polyacrylamide, or poly( N -vinylpyrrolidone)) using RAFT polymerization under mild conditions (at 40 °C). The abilities of four chain transfer agents (CTAs) to copolymerize VAc and MAF-TBE were compared. Recently reported as a universal RAFT CTA, cyanomethyl 3, 5-dimethyl-1 H -pyrazole-1-carbodithioate (CDPCD) afforded better-defined BCPs compared to O -ethyl- S -(1-methoxycarbonyl)ethyldithiocarbonate (CTA-XA), 2-cyano-2-propyl benzodithioate (CPDB), and 4-cyano-4-(2-phenylethanesulfanylthiocarbonyl)sulfanyl pentanoic acid (PETTC). While the chain extension of poly(VAc- alt -MAF-TBE)-DPCD with vinyl acetate (VAc), styrene (St), n -butyl acrylate ( n BA), and dimethyl acrylamide (DMA) led to well-defined poly(VAc- alt -MAF-TBE)- b -poly(M) BCPs with acceptable dispersity values ( Đ ≤ 1.36), high Đ values were observed when methyl methacrylate (MMA) and N -vinylpyrrolidone (NVP) were used to form the second block. An attempt to synthesize poly(M)- b -poly(VAc- alt -MAF-TBE) block copolymers using poly(M)-DPCD as the macroCTA led to copolymers with high Đ values (1.53–2.0).