POLY 258 |
| Lactide is a moderately polymerizable monomer, so that highly active promoters are required to mediate its ROP under mild conditions. The O-carboxyanhydride derived from lactic acid (lacOCA) was found to be a promising synthetic equivalent of lactide, exhibiting remarkable reactivity in nucleophile-catalyzed ROP. Accordingly, PLAs of controlled molecular weights and narrow polydispersities are typically obtained under mild conditions using DMAP and various protic initiators. The preparation of variously substituted poly(alpha-hydroxyacids) will also be discussed, as well as the enzymatic polymerization of lacOCA using lipases. |
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Polymers from Renewable Resources
8:20 AM-11:45 AM, Monday, August 20, 2007 Westin Boston Waterfront -- Douglas, Oral
Division of Polymer Chemistry |