Bedő, Dániel and Imre, Balázs and Domján, Attila and Schön, Peter and Vancsó, Julius G. and Pukánszky, Béla (2017) Coupling of poly(lactic acid) with a polyurethane elastomer by reactive processing. EUROPEAN POLYMER JOURNAL, 97. pp. 409-417. ISSN 0014-3057
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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.
Item Type: | Article |
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Subjects: | Q Science / természettudomány > Q1 Science (General) / természettudomány általában Q Science / természettudomány > QD Chemistry / kémia T Technology / alkalmazott, műszaki tudományok > T2 Technology (General) / műszaki tudományok általában |
Depositing User: | Dr. János/J Móczó |
Date Deposited: | 27 Nov 2017 15:28 |
Last Modified: | 05 Apr 2023 07:12 |
URI: | http://real.mtak.hu/id/eprint/70613 |
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