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Jikei, M., Takeyama, Y., Yamadoi, Y., Shinbo, N., Matsumoto, K., Motokawa, M., Ishibashi, K. and Yamamoto, F. (2015) Synthesis and Properties of Poly(L-lactide)-Poly(ε-caprolactone) multibl Ck Copolymers by the Self-Polyc Ondensation of Dibl Ckmacromonomers. Polymer Journal, 47, 657-665.
https://doi.org/10.1038/pj.2015.49

has been cited by the following article:

• TITLE: Highly Branched Poly(α-Methylene-γ-Butyrolactone) from Ring-Opening Homopolymerization

  AUTHORS: Pascal Binda, Zakiya Barnes, Dechristian Guthrie, Rasaan Ford

  KEYWORDS: Lanthanide, α-Methylene-γ-Butyrolactone, Polyesters, Ring-Opening Polymerization

  JOURNAL NAME: Open Journal of Polymer Chemistry, Vol.7 No.4, November 30, 2017

  ABSTRACT: New heteroleptic lanthanide complex [L1ILaN{Si(CH3)2}] (1) containing tridentate [ONO] ancillary ligand was synthesized from an acid-base ligand exchange reaction with ligands H2L1 and corresponding homoleptic lanthanide compound La[N{Si(CH3)3}2]3. Meanwhile, dimeric complexes [L1LaCl] (2) and [L1ILaCl] (3) were prepared from salt metathesis reaction between one equivalent of ligands H2LI,II, three equivalent of NaN{Si(CH3)3}2, and one equivalent of LaCl3. These compounds were characterized by nuclear magnetic resonance (300 MHz) and elemental analysis. These complexes were used as catalysts in the ring-opening homopolymerization of α-methylene-γ-butyrolactone. While compound 1 did not show any significant reactivity, compounds 2 and 3 gave significant amount of highly branched poly(α-methylene-γ-butyrolactone) as confirmed by 1H NMR spectroscopy and Malvern’s triple detector GPCMax analysis in DMSO with molecular weights of over 500,000 Dalton. The glass-transition temperatures of the branched polymer samples were determined using a Dynamic Mechanical Analyzer, DMA Q800.