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Coupling of poly(lactic acid) with a polyurethane elastomer by reactive processing
KTH, School of Biotechnology (BIO), Glycoscience. Hungarian Academy of Sciences, Hungary; Budapest University of Technology and Economics, Hungary.
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2017 (English)In: European Polymer Journal, ISSN 0014-3057, E-ISSN 1873-1945, Vol. 97, p. 409-417Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 97, p. 409-417
Keyword [en]
Poly(lactic acid), Segmented polyurethane elastomer, Reactive compatibilization, Diffusion-ordered spectroscopy
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-221872DOI: 10.1016/j.eurpolymj.2017.10.031ISI: 000419415800042Scopus ID: 2-s2.0-85032917300OAI: oai:DiVA.org:kth-221872DiVA, id: diva2:1178721
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QC 20180130

Available from: 2018-01-30 Created: 2018-01-30 Last updated: 2018-01-30Bibliographically approved

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CiteExportLink to record
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  • apa
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Output format
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