%0 Journal Article
%T Ring-Opening Polymerization of l-Lactic Acid O-Carboxyanhydrides Initiated by Alkoxy Rare Earth Compounds
%A Zhengguo He
%A Lin Jiang
%A Yongming Chuan
%A Hongli Li
%A Minglong Yuan
%J Molecules
%D 2013
%I MDPI AG
%R 10.3390/molecules181012768
%X The ring-opening polymerization of l-lactic acid O-carboxyanhydrides was initiated by triisopropoxyneodymium in toluene-THF mixtures. Typically, high yields and relatively high molecular weight PLAs were obtained within 4 h at 25 ¡ãC. The reaction was highly controllable and easy to conduct, and the molecular weight distribution of the PLAs was rather narrow (Mw/Mn = 1.10¨C1.36). NMR analysis showed that one end of the PLA chain consisted of an isopropoxy group, while the other end of the chain contained a hydroxyl group. Due to their availability and high polymerizability, Lac-OCAs are promising monomers for the preparation of tailored architectures derived from well-defined PLAs.
%K l-lactic acid O-carboxyanhydride
%K ring-opening polymerization
%K triisopropoxyneodymium initiator
%U http://www.mdpi.com/1420-3049/18/10/12768