Author : Carla Natalia Ayala Castro
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (71 download)
Book Synopsis Single Site Metal Catalysts for Ring Opening Polymerization of Lactides by : Carla Natalia Ayala Castro
Download or read book Single Site Metal Catalysts for Ring Opening Polymerization of Lactides written by Carla Natalia Ayala Castro and published by . This book was released on 2006 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Polymers derived from lactide (L, rae and meso) are currently finding numerous applications as biodegradable and biocompatible packaging materials for bulk commodities and drug delivery agents. The physical properties of the polymer much as the rate of hydrolysis, which forms a mechanism for time release of drugs, are dependent upon the microstructure of the polymer. Single-site metal alkoxide catalysts of the form LM(OR) where L = a [beta]-diiminate ligand and M Mg or Zn have proved effective in stereoselective ring opening polymerizations. To this end a new series of compounds LMX have been prepared where L = CH(C[t]BuNC6H3-2,6-[i]Pr2)2, M = Mg, Zn and Sn, and X a potential initiator for ring opening polymerizations of lactide i.e. an amide or alkoxide. A comparison is made with the previously reported complexes where L = CH(CMeNC6H3-2,6-[i]Pr2)2, M=Mg, Zn and Sn, and X=a potential initiator for ring opening polymerizations of lactide i.e. an amide or alkoxide. A comparison is made with the previously reported complexes where L=CH(CMeNC6H3-2,6-[i]Pr2)2.