Synthesis and Characterization of A-B-A Triblock Copolymers Derived From Chloro-Telechelic Poly(L-lactide): Combining Ring-Opening Polymerization (ROP) and Atom Transfer Radical Polymerization (ATRP)
Document Type
Article
Publication Date
5-11-2005
Department
Polymers and High Performance Materials
Abstract
Ring-opening polymerization (ROP) of L-lactide was combined with atom transfer radical polymerization (ATRP) to produce well-defined linear block copolymers. Poly(L-lactide) (PLLA) was synthesized via ROP using ethylene glycol as an initiator and stannous octoate as a catalyst. The isolated hydroxy-telechelic PLLA was reacted with thionyl chloride and pyridine in toluene to afford chloro-telechelic PLLA (Cl-PLLA-Cl). The latter was employed as a macroinitiator in the synthesis of A-B-A triblock copolymers having either tert-butyl acrylate or benzyl acrylate outer blocks. Outer-block molecular weight was targeted by the mole ratio of monomer (acrylate) to the PLLA chloride initiating sites. The actual incorporation of acrylate into the triblock copolymer was lower than the molar feed ratio as the copolymer became increasingly less soluble upon conversion of acrylate in all cases. © 2005 Elsevier Ltd. All rights reserved.
Publication Title
Polymer
Volume
46
Issue
11
First Page
3628
Last Page
3638
Recommended Citation
Messman, J. M.,
Scheuer, A. D.,
Storey, R. F.
(2005). Synthesis and Characterization of A-B-A Triblock Copolymers Derived From Chloro-Telechelic Poly(L-lactide): Combining Ring-Opening Polymerization (ROP) and Atom Transfer Radical Polymerization (ATRP). Polymer, 46(11), 3628-3638.
Available at: https://aquila.usm.edu/fac_pubs/2757