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Coupling of poly(la...
Coupling of poly(lactic acid) with a polyurethane elastomer by reactive processing
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Bedo, Daniel (author)
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- Imre, Balazs (author)
- KTH,Glykovetenskap,Hungarian Academy of Sciences, Hungary; Budapest University of Technology and Economics, Hungary
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Domjan, Attila (author)
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Schoen, Peter (author)
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Vancso, G. Julius (author)
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Pukanszky, Bela (author)
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(creator_code:org_t)
- PERGAMON-ELSEVIER SCIENCE LTD, 2017
- 2017
- English.
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In: European Polymer Journal. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0014-3057 .- 1873-1945. ; 97, s. 409-417
- Related links:
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http://real.mtak.hu/...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- 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 PEA-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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
Keyword
- Poly(lactic acid)
- Segmented polyurethane elastomer
- Reactive compatibilization
- Diffusion-ordered spectroscopy
Publication and Content Type
- ref (subject category)
- art (subject category)
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