Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 181, Issue -, Pages 718-733Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.03.139
Keywords
Polylactide; Poly(methyl methacrylate); Graft copolymer; Blending; Toughening
Funding
- NationalNatural Science Foundation of China [51573130]
- Open Foundation of Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics
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A novel poly(epichlorohydrin-co-ethylene oxide)-g-poly( methyl methacrylate) copolymer (ECO-g-PMMA) was successfully synthesized via the AMP method, which significantly improved the performance of PLA when used as a toughening agent and compatibilizer for PIA and PLA/ECO blends. The ternary PLA/ECO/ECO-g-PMMA copolymer blends exhibited remarkably high impact strength and showed a unique quasi-continuous network structure with varying ECO-g-PMMA content, demonstrating excellent mechanical performance.
A novel poly(epichlorohydrin-co-ethylene oxide)-g-poly( methyl methacrylate) copolymer (ECO-g-PMMA) was successfully synthesized from a commercially renewable elastomer via the AMP method. The graft copolymer was investigated as a toughening agent and compatibilizer for polylactide (PIA) and PLA/ECO blends, respectively. Binary blending PIA with the copolymers (5-15 wt%) significantly improved the strain at break of PLA above 200% without a great strength loss. More importantly, the ternary PLA/ECO/ECO-g-PMMA copolymer blends exhibited a remarkably high impact strength of 96.9 kJ/m(2) with non-broken behaviors. An interesting phase structure transformation from a typical sea-island structure to a unique quasi-continuous network structure was observed with varying the content of ECO-g-PMMA from 0 to 15 wt% in the ternary blends. The native toughening mechanism analysis indicated the synergistic toughening effect of the good interfacial adhesion and unique quasi-continuous morphology endowed the ternary blends with excellent mechanical performance. (C) 2021 Published by Elsevier B.V.
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