The isoselective organocatalyzed ring-opening polymerization of rac-lactide is triggered by a chiral binary organocatalytic system, achieving highly semi-crystalline and metal-free polylactides.

New opportunities, provided by the 2,2'-[1,1'-binaphthyl-2,2'-diylbis(nitrylomethilidyne)]diphenol (SB(OH)2)/Al(OiPr)3/racemic lactide (rac-LA) polymerization system, employing a combination of stereoelection with (S) and (R) ligand-exchange mechanism at Al-alkoxide active centers were explored. The stereoelectivity was comparable to that determined for the process with an additional synthetic ...

Chirality-driven microphase-separated morphology, poly(l-lactide) (PLLA) left-handed nanohelices hexagonally packed in PS matrix, was obtained from chiral diblock copolymers, poly(styrene)-b-poly(l-lactide). This is perhaps for the first time; the helical superstructures of chiral block copolymers were generated in the bulk and self-assembled to a two-dimensionally (2D) packed lattice. Now, the...

Abstract The review presents modern advances in the synthesis of biodegradable polymers based on lactide various topologies and also analyzes main methods for preparation nanoparticles that show promise creation targeted drug delivery systems.

Experiments are performed to obtain the highest T m and Δ H values for poly( l -lactide)s. They also include comparison with literature data of cyclic linear species.

A new heteroleptic ethyl-zinc complex stabilized by a chelating bis(morpholinomethyl)phenoxy ligand has been synthesised and shown to be a highly potent initiator for the immortal ring-opening polymerisation (ROP) of lactide and beta-butyrolactone, being able to convert up to 50,000 equiv. of monomer in the presence of up to 1000 equiv. of an alcohol as transfer agent. Two related heteroleptic ...

Tetranuclear [M 4 (OEt) 8 (L 1 ) (μ-O) 2 ] and dinuclear H (μ-O)] complexes (M = Nb, Ta) derived from benzilic acid diphenylglycine 3 have been structurally characterized are capable of the ROP μ-caprolactone rac -lactide.