Controlled Synthesis of Block Copolymers by Mechanistic Transformation from Atom Transfer Radical Polymerization to Iniferter Process. Issue 14 (14th May 2019)

• Record Type: Journal Article
• Authors: Aydogan, Cansu; Ciftci, Mustafa; Yagci, Yusuf
• Is Part Of: Macromolecular rapid communications. Volume 40:Issue 14(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-14
• Subjects: atom transfer radical polymerization -- block copolymers -- iniferter -- manganese decacarbonyl -- radical coupling -- visible light; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201900109
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: A straightforward transformation protocol combining two distinct living polymerization methods for the controlled synthesis of block copolymers is described. In the first step, bromo‐terminated poly(methyl methacrylate) is prepared by atom transfer radical polymerization (ATRP). Then, a bromide end group is substituted with a triphenylmethyl (trityl) functionality under visible light irradiation using dimanganese decacarbonyl (Mn2 (CO)10 ) photochemistry. The resulting polymers with trityl end groups are used as macroiniferter for the polymerization of styrene and tert ‐butyl acrylate ( t BA) to yield desired block copolymers with narrow molecular weight distribution. Moreover, the amphiphilic copolymers with acrylic acid functionalities are obtained by the hydrolyzation of poly( tert ‐butyl acrylate) containing block copolymers with trifluoroacetic acid. Abstract : A novel strategy combining two different living polymerization methods for the controlled synthesis of block copolymers is presented. In the first part, bromo‐terminated poly(methyl methacrylate) is prepared by atom transfer radical polymerization. Secondly, trityl functional polymers are synthesized using dimanganese decacarbonyl photochemistry by a coupling process. By using the obtained polymers as macroiniferter, desired block copolymers with narrow molecular weight distribution are obtained.