Synthesis of Block Copolymers of Varying Architecture Through Suppression of Transesterification during Coordinated Anionic Ring Opening Polymerization
Open Access
- 5 July 2012
- journal article
- research article
- Published by Hindawi Limited in International Journal of Biomaterials
- Vol. 2012, 1-11
- https://doi.org/10.1155/2012/390947
Abstract
Well-defined di- and triblock copolymers consisting ofε-caprolactone (CL), L-lactide (LA), and trimethylene carbonate (TMC) were synthesized via “PLA first route” in coordinated anionic ring opening polymerization/copolymerization (CAROP) with tin (II) octoate as catalyst. The desired block structure was preserved by use of protective additiveα-methylstyrene by preventing the transesterification side-reactions. MALDI-TOF analysis revealed that the protection mechanism is associated withα-methylstyrene and tin (II) octoate complexation. Additionally, it was shown that use ofα-methylstyrene in ring opening polymerization allowed the formation of polyesters with high molar mass.Keywords
This publication has 31 references indexed in Scilit:
- L,L‐Lactide and ε‐Caprolactone Block Copolymers by a ‘Poly(L,L‐lactide) Block First’ RouteMacromolecular Rapid Communications, 2007
- Synthesis and characterization of poly(L-lactide-co-?-caprolactone) (B)-poly(L-lactide) (A) ABA block copolymersPolymers for Advanced Technologies, 2005
- Synthesis and degradation of PLA–PCL–PLA triblock copolymer prepared by successive polymerization of ε-caprolactone and dl-lactidePolymer, 2004
- Fibrillar structure of resorbable microblock copolymers based on 1,5‐dioxepan‐2‐one and ε‐caprolactoneJournal of Polymer Science Part A: Polymer Chemistry, 2003
- Kinetics and mechanism of cyclic esters polymerisation initiated with tin(II) octoate, 4. Influence of proton trapping agents on the kinetics of ɛ-caprolactone andL,L-dilactide polymerisationMacromolecular Rapid Communications, 2000
- Effect of stannous octoate on the thermal decomposition of 2,2?-azobis(isobutyronitrile)Polymer International, 2000
- Interference between Reactants in Simultaneous Interpenetrating Polymer Network Formation. 1. Influence of Tin Catalyst on Free-Radical Copolymerization of Methyl Methacrylate with Trimethylolpropane TrimethacrylateMacromolecules, 1999
- Bulk polymerization of lactides initiated by aluminium isopropoxide, 2. Beneficial effect of lewis bases and transfer agentsMacromolecular Chemistry and Physics, 1997
- Macromolecular engineering of polyactones and polyactides. 12. Study of the depolymerization reactions of poly(.epsilon.-caprolactone) with functional aluminum alkoxide end groupsMacromolecules, 1993
- Macromolecular engineering of polylactones and polylactides. 5. Synthesis and characterization of diblock copolymers based on poly-iε-caprolactone and poly(L,L or D,L)lactide by aluminum alkoxidesMacromolecules, 1991