Block Copolymers by Mechanistic Transformation from PROAD to Iniferter Process. Issue 18 (9th August 2018)

• Record Type: Journal Article
• Authors: Ciftci, Mustafa; Yagci, Yusuf
• Is Part Of: Macromolecular rapid communications. Volume 39:Issue 18(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-08-09
• Subjects: block copolymers -- cationic polymerization -- free radical polymerization -- iniferters -- mechanistic transformation -- photoinduced radical oxidation/addition/deactivation; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201800464
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: A facile strategy for synthesizing block copolymers by the combination of two different living polymerization techniques, namely, photoinduced radical oxidation/addition/deactivation (PROAD) and iniferter processes is described. In the first step, PROAD polymerization of isobutyl vinyl ether using bromotriphenylmethane, dimanganese decacarbonyl (Mn2 (CO)10 ), and diphenyliodonium bromide (Ph2 I + Br − ) is carried out to yield polymers with triphenylmethyl (trityl) end groups. These prepolymers are used as macroiniferters in thermally induced free radical polymerization of vinyl monomers such as methyl methacrylate, tert ‐butyl acrylate, and styrene, resulting in the formation of corresponding block copolymers free from homopolymers. The precursor polymer and final block copolymers are characterized by 1 H NMR, FT‐IR, GPC, and DSC analyses. Abstract : A novel synthetic approach for the formation of block copolymers based on mechanistic transformation from photoinitiated living cationic polymerization to iniferter process is presented.