Tri-n-butylboron-p-quinone catalytic system in synthesis of block copolymers

Abstract

Block copolymerization of styrene and methyl methacrylate under the action of macroinitiators synthesized in the presence of the tri-n-butylboron-p-quinone system was studied. The block copolymers have high molecular weight, narrow molecular-weight distribution, and improved physicomechanical properties.

New method for controlled synthesis of polylactide block copolymers: organoborane/p‐quinone system and reversible‐deactivation radical polymerization

“…In air, the BC bonds are oxidized slowly to afford (EtO) 2 BO groups. Macromolecules containing such terminal groups are unreactive towards oxygen‐centered radicals and, hence, cannot act as RDRP agents 56 …”

“…Macromolecules containing such terminal groups are unreactive towards oxygen-centered radicals and, hence, cannot act as RDRP agents. 56…”

“…55 Using this approach, copolymers with well-defined molecular weight and chain microstructure were synthesized. [56][57][58] Further, trialkylborane/p-quinone systems were successfully used for graft copolymerization onto starch. 59 Polymers obtained in the presence of trialkylborane/p-quinone systems are characterized by increased thermal stability and isotacticity.…”

“…In contrast, polystyrene (PS) macroradicals can be involved exclusively in direction 1 55 . Using this approach, copolymers with well‐defined molecular weight and chain microstructure were synthesized 56–58 . Further, trialkylborane/ p ‐quinone systems were successfully used for graft copolymerization onto starch 59 .…”