Catalyst switch strategy enabled a single polymer with five different crystalline phases

Pengfei Zhang, Viko Ladelta, Edy Abou-hamad, Alejandro J. Müller and Nikos Hadjichristidis ()
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Pengfei Zhang: King Abdullah University of Science and Technology (KAUST)
Viko Ladelta: King Abdullah University of Science and Technology (KAUST)
Edy Abou-hamad: King Abdullah University of Science and Technology (KAUST)
Alejandro J. Müller: University of the Basque Country UPV/EHU
Nikos Hadjichristidis: King Abdullah University of Science and Technology (KAUST)

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Well-defined multicrystalline multiblock polymers are essential model polymers for advancing crystallization physics, phase separation, self-assembly, and improving the mechanical properties of materials. However, due to different chain properties and incompatible synthetic methodologies, multicrystalline multiblock polymers with more than two crystallites are rarely reported. Herein, by combining polyhomologation, ring-opening polymerization, and catalyst switch strategy, we synthesized a pentacrystalline pentablock quintopolymer, polyethylene-b-poly(ethylene oxide)-b-poly(ε-caprolactone)-b-poly(L-lactide)-b-polyglycolide (PE-b-PEO-b-PCL-b-PLLA-b-PGA). The fluoroalcohol-assisted catalyst switch enables the successful incorporation of a high melting point polyglycolide block into the complex multiblock structure. Solid-state nuclear magnetic resonance spectroscopy, X-ray diffraction, and differential scanning calorimetry revealed the existence of five different crystalline phases.

Date: 2023
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DOI: 10.1038/s41467-023-42955-3

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