Synthesis of zwitterionic polymer by SET‐LRP at room temperature in aqueous

Abstract

The Cu 0 -mediated single electron transfer-living radical polymerization of acrylamide and N,N-dimethyl-N-methacryloyloxyethyl-N-sulfobutyl ammonium in aqueous at 25 C using 2-chloropropionamide as initiator with Cu 0 powder/tris-(2-dimethylamino ethyl)amine (Me 6 -TREN) as catalyst system is studied. The results showed the characteristic of the ''living'' polymerization that were the M n of polymers increased linearly with monomer conversion and the ln([M] 0 /[M]) increased linearly with time too, meanwhile the narrow molecular of weight distributions were found at most cases. Because of the high rate constant of propagation and bimolecular termination of the acrylamide, the external addition of CuCl 2 is required to mediate deactivation the early stage of polymerization. In addition, the disproportionation constant of Cu I X/L in H 2 O is higher than in other solvents and the coordination of amino group and Cu II takes place easily, so the isopropanol or N,N-dimethylformamide is added to control the polymerization. High conversions were achieved within short time and the polymers prepared showed good antipolyelectrolyte properties in inorganic salts solutions. V C 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: [432][433][434][435][436][437][438][439][440] 2011

Structures and Synthesis of Zwitterionic Polymers

“…Similar to the revolutionary changes brought to polyelectrolyte synthesis [106], polyzwitterions have equally profited from this development. RDRP techniques offer direct access to polymers bearing zwitterionic groups with previously unthinkable features, such as predefined molar masses and narrow molar mass distributions [163,[182][183][184][185][186][187][188][189] as well as well-defined functional end groups [61,166,182,[190][191][192][193][194][195][196][197][198][199][200][201][202][203][204][205][206][207][208]. Moreover, complex architectures, such as block copolymers [14,[46][47][48]166,167,169,173,187,, graft copolymers [164,213,237,[241][242]…”

Effect of the zwitterion structure on the thermo-responsive behaviour of poly(sulfobetaine methacrylates)

“…While polymers derived from monomers 5 have been studied occasionally, 29,45,46,48,50,[59][60][61] and polymers from monomer 4…”

Transformation of Thioester‐Initiated Star Polymers into Linear Arms via Native Chemical Ligation

“…Similarly, phenolic ester–based initiators such as 2‐bromo‐2‐methylpropionic acid phenyl ester or 2‐chloro‐2‐methylpropionic acid phenyl ester find wide use in polymerizations . Complimentarily, amide‐based initiators such as 2‐chloropropionamide or 2‐bromo‐2‐N‐phenyl‐propionamide can also be applied as initiators for Cu‐mediated polymerization techniques . Last but not the least, multifunctional initiators based on these structural varieties have also been widely reported in the literature, and the search for functional initiator structures is still going on, as they allow the preparation of functional polymers with high chain end fidelity …”