Ring opening polymerisation

Invoking Side-Chain Functionality for the Mediation of Regioselectivity during Ring-Opening Polymerization of Glucose Carbonates

“…A primary strategy for the construction of well-defined glucose-based polycarbonates has involved controlled ROPs. 10 The guanidine organocatalyst, TBD, has been applied widely for the ROP for a variety of cyclic monomers in the presence of alcohol or amine initiators, while exerting high reactivity and excellent control of polymer molar mass and dispersity. 11−19 More recently, regioselectivity has been observed using TBD during the ring-opening of cyclic carbonates and sugar-based fused-cyclic monomers.…”

“…Renewable sugar-based polymers have gained significant attention from chemists and from the broader community, due to their sustainability, structural diversity, potential for degradability, and as alternatives to petrochemicals for commercial applications. − There have been numerous studies on the development of sugar-based polymers over the past decades, which have often been devoted to the exploration of diversified monomer structures, the incorporation of functionality, the expansion of polymerization methods, and the utilization in various practical applications. − Among others, glucose is of great interest, owing to its natural abundancy and high degree of functionality for tailoring of physicochemical and mechanical properties. A primary strategy for the construction of well-defined glucose-based polycarbonates has involved controlled ROPs . The guanidine organocatalyst, TBD, has been applied widely for the ROP for a variety of cyclic monomers in the presence of alcohol or amine initiators, while exerting high reactivity and excellent control of polymer molar mass and dispersity. − More recently, regioselectivity has been observed using TBD during the ring-opening of cyclic carbonates and sugar-based fused-cyclic monomers. , Despite the importance of regiochemistry in directing synthesis, regulating properties, and thereby affecting polymer performance and applications, studies have seldom focused on revealing the regiochemical structures of the complex glucose-based polymers.…”

Towards a selective synthetic route for cobalt amino acid complexes and their application in ring opening polymerization of rac-lactide

“…[1][2][3][4][5] PLA is most efficiently synthesized by ring opening polymerization (ROP) of rac-lactide (LA) using homogeneous metal complexes as initiators or catalyst. 6 The most active and selective complexes contain metal centers of Al(III), 7 Fe(II) 8 In(III), 9,10 Zn(II) [11][12][13] and Y(III). 14 Cobalt based catalysts have been widely used in polymerization reactions and more recently as bio-inspired photocatalysts, [15][16][17][18][19][20][21][22] but they are far less investigated in ROP of cyclic esters.…”

“… 1–5 PLA is most efficiently synthesized by ring opening polymerization (ROP) of rac -lactide (LA) using homogeneous metal complexes as initiators or catalyst. 6 The most active and selective complexes contain metal centers of Al( iii ), 7 Fe( ii ) 8 In( iii ), 9,10 Zn( ii ) 11–13 and Y( iii ). 14 …”