Coupling of poly(lactic acid) with a polyurethane elastomer by reactive processing

Dániel Bedő, Balázs Imre, Attila Domján, Peter Schön, G. Julius Vancso, Béla Pukánszky

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
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Abstract

A segmented polyurethane elastomer (PU) was synthesized in poly(lactic acid) (PLA) melt by reactive processing. The isocyanate component was anticipated to react with the end-groups of PLA resulting in the formation of block-copolymers. The stoichiometry of the functional groups was optimized in the preliminary experiments. Two different processing methods were compared in the further experiments: conventional mixing of PU with PLA (PLA/PU), and reactive blending (PLA-b-PU). The comparison of the structure and properties of compatibilized reactive blends and conventional physical blends clearly shows the benefits of reactive processing. Coupling resulted in a finer dispersion of the particles in the matrix leading to better mechanical properties in the reactive blend. The successful synthesis of PLA-b-PU block copolymers was confirmed by NMR spectroscopy. The isocyanate component was found to react only with the hydroxyl end-groups of PLA, while the formation of amide and acylurea groups was not detected on the carboxyl end.

Original languageEnglish
Pages (from-to)409-417
Number of pages9
JournalEuropean polymer journal
Volume97
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

Elastomers
lactic acid
Polyurethanes
elastomers
Lactic acid
Isocyanates
Processing
isocyanates
block copolymers
Block copolymers
Amides
Stoichiometry
Hydroxyl Radical
Functional groups
amides
Nuclear magnetic resonance spectroscopy
stoichiometry
Experiments
poly(lactic acid)
mechanical properties

Keywords

  • Diffusion-ordered spectroscopy
  • Poly(lactic acid)
  • Reactive compatibilization
  • Segmented polyurethane elastomer

Cite this

Bedő, Dániel ; Imre, Balázs ; Domján, Attila ; Schön, Peter ; Vancso, G. Julius ; Pukánszky, Béla. / Coupling of poly(lactic acid) with a polyurethane elastomer by reactive processing. In: European polymer journal. 2017 ; Vol. 97. pp. 409-417.
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Coupling of poly(lactic acid) with a polyurethane elastomer by reactive processing. / Bedő, Dániel; Imre, Balázs; Domján, Attila; Schön, Peter; Vancso, G. Julius; Pukánszky, Béla.

In: European polymer journal, Vol. 97, 01.12.2017, p. 409-417.

Research output: Contribution to journalArticleAcademicpeer-review

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