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Issue 8, 2018
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Preparation of multiblock copolymers via step-wise addition of L-lactide and trimethylene carbonate

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Abstract

Poly(L-lactide) (PLA) is a bioderived and biodegradable polymer that has limited applications due to its hard and brittle nature. Incorporation of 1,3-trimethylene carbonate into PLA, in a block copolymer fashion, improves the mechanical properties, while retaining the biodegradability of the polymer, and broadens its range of applications. However, the preparation of 1,3-trimethylene carbonate (TMC)/L-lactide (LA) copolymers beyond diblock and triblock structures has not been reported, with explanations focusing mostly on thermodynamic reasons that impede the copolymerization of TMC after lactide. We discuss the preparation of multiblock copolymers via the ring opening polymerization (ROP) of LA and TMC, in a step-wise addition, by a ferrocene-chelating heteroscorpionate zinc complex, {[fc(PPh2)(BH[(3,5-Me)2pz]2)]Zn(μ-OCH2Ph)}2 ([(fcP,B)Zn(μ-OCH2Ph)]2, fc = 1,1′-ferrocenediyl, pz = pyrazole). The synthesis of up to pentablock copolymers, from various combinations of LA and TMC, was accomplished and the physical, thermal, and mechanical properties of the resulting copolymers evaluated.

Graphical abstract: Preparation of multiblock copolymers via step-wise addition of l-lactide and trimethylene carbonate

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Publication details

The article was received on 18 Oct 2017, accepted on 10 Jan 2018 and first published on 11 Jan 2018


Article type: Edge Article
DOI: 10.1039/C7SC04507G
Citation: Chem. Sci., 2018,9, 2168-2178
  • Open access: Creative Commons BY license
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    Preparation of multiblock copolymers via step-wise addition of L-lactide and trimethylene carbonate

    M. Abubekerov, J. Wei, K. R. Swartz, Z. Xie, Q. Pei and P. L. Diaconescu, Chem. Sci., 2018, 9, 2168
    DOI: 10.1039/C7SC04507G

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