Fredrik Nederberg, Eric Appel, et al.
Biomacromolecules
Highly isotactic polylactide with a high melting temperature was synthesized from rac-lactide through an organocatalytic route using dimeric phosphazene base 1-tert-butyl-2,2,4,4,4-pentakis(dimethylamino)-2Λ5,4Λ5-catenadi(phosphazene) (P2-t-Bu) catalyst at low temperature. Microstructural analysis of the prepared polymer using homodecoupled 1H NMR spectroscopy revealed the formation of a stereoblock architecture containing long isotactic sequence of R and S blocks in the main chain. A proposed mechanism involving chain-end control and stereoerror explains the stereoselective polymerization. Copyright © 2007 American Chemical Society.
Fredrik Nederberg, Eric Appel, et al.
Biomacromolecules
Fredrik Nederberg, Vivian Trang, et al.
Soft Matter
Georgios Polizos, Enis Tuncer, et al.
Langmuir
Fredrik Nederberg, Eric F. Connor, et al.
Angewandte Chemie - International Edition