4.8 Article

Block Poly(carbonate-ester) Ionomers as High-Performance and Recyclable Thermoplastic Elastomers

期刊

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202210748

关键词

Ionomers; Epoxide and Anhydride Ring-Opening Copolymerization; Sustainability; Thermoplastic Elastomer; Polyesters

资金

  1. Engineering and Physical Sciences Research Council [EP/S018603/1, EP/R027129/1, EP/V003321/1]
  2. Faraday Institute [FIRG026]
  3. Oxford Martin School (Future of Plastics)

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This study reports well-defined reprocessable poly(ester-b-carbonate-b-ester) elastomers with impressive physical properties and degradability. The superior performance of these elastomers is attributed to the highly entangled soft segments, fully reversible strain-induced crystallization, and precisely placed Zn-II-carboxylates dynamically crosslinking the hard domains.
Thermoplastic elastomers based on polyesters/carbonates have the potential to maximize recyclability, degradability and renewable resource use. However, they often underperform and suffer from the familiar trade-off between strength and extensibility. Herein, we report well-defined reprocessable poly(ester-b-carbonate-b-ester) elastomers with impressive tensile strengths (60 MPa), elasticity (>800 %) and recovery (95 %). Plus, the ester/carbonate linkages are fully degradable and enable chemical recycling. The superior performances are attributed to three features: (1) Highly entangled soft segments; (2) Fully reversible strain-induced crystallization and (3) Precisely placed Zn-II-carboxylates dynamically crosslinking the hard domains. The one-pot synthesis couples controlled cyclic monomer ring-opening polymerization and alternating epoxide/anhydride ring-opening copolymerization. Efficient convresion to ionomers is achieved by reacting vinyl-epoxides to install Zn-II-carboxylates.

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