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Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites

Maleic anhydride (MAH) was used as the grafting monomer, which was prepared by melt grafting reaction in the twin screw extruder with dicumyl peroxide (DCP) as the initiator, polylactic acid grafted with maleic anhydride (MAH-g-PLA) was successfully prepared as the interface compatibilizer. The PLA/...

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Detalles Bibliográficos
Autores principales: Zhang, Lei, Lv, Shanshan, Sun, Ce, Wan, Lu, Tan, Haiyan, Zhang, Yanhua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6418522/
https://www.ncbi.nlm.nih.gov/pubmed/30965894
http://dx.doi.org/10.3390/polym9110591
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author Zhang, Lei
Lv, Shanshan
Sun, Ce
Wan, Lu
Tan, Haiyan
Zhang, Yanhua
author_facet Zhang, Lei
Lv, Shanshan
Sun, Ce
Wan, Lu
Tan, Haiyan
Zhang, Yanhua
author_sort Zhang, Lei
collection PubMed
description Maleic anhydride (MAH) was used as the grafting monomer, which was prepared by melt grafting reaction in the twin screw extruder with dicumyl peroxide (DCP) as the initiator, polylactic acid grafted with maleic anhydride (MAH-g-PLA) was successfully prepared as the interface compatibilizer. The PLA/Wood fiber/MAH-g-PLA composites were prepared by melt blending and injection molding with different proportions of compatibilizer added, within which PLA was for the matrix phase and wood fiber was for the reinforcing phase. The crystallinity, microstructure, thermal stability and dynamic thermomechanical property of the composites were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), thermo gravimetric analyzer (TGA) and dynamic mechanical thermal analysis (DMA). Furthermore, the mechanical and water absorption properties of the composites were also characterized. Results showed that the tensile strength and flexural strength of the composites attained the highest at 30% MAH-g-PLA added, where the crystallinity of the composites also showed the highest value. DMA results showed that the addition of MAH-g-PLA interfacial compatibilizer increased the loss modulus of the composites and improved the toughness. Scanning electron microscopy (SEM) showed that when the MAH-g-PLA was used, wood fiber is well dispersed in the PLA matrix phase, and that the interfacial compatibility between the matrix and the enhanced phase was improved. Therefore, the addition of MAH-g-PLA could improve the interfacial compatibility of PLA/Wood fiber composites and improve the mechanical properties of the composites.
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spelling pubmed-64185222019-04-02 Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites Zhang, Lei Lv, Shanshan Sun, Ce Wan, Lu Tan, Haiyan Zhang, Yanhua Polymers (Basel) Article Maleic anhydride (MAH) was used as the grafting monomer, which was prepared by melt grafting reaction in the twin screw extruder with dicumyl peroxide (DCP) as the initiator, polylactic acid grafted with maleic anhydride (MAH-g-PLA) was successfully prepared as the interface compatibilizer. The PLA/Wood fiber/MAH-g-PLA composites were prepared by melt blending and injection molding with different proportions of compatibilizer added, within which PLA was for the matrix phase and wood fiber was for the reinforcing phase. The crystallinity, microstructure, thermal stability and dynamic thermomechanical property of the composites were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), thermo gravimetric analyzer (TGA) and dynamic mechanical thermal analysis (DMA). Furthermore, the mechanical and water absorption properties of the composites were also characterized. Results showed that the tensile strength and flexural strength of the composites attained the highest at 30% MAH-g-PLA added, where the crystallinity of the composites also showed the highest value. DMA results showed that the addition of MAH-g-PLA interfacial compatibilizer increased the loss modulus of the composites and improved the toughness. Scanning electron microscopy (SEM) showed that when the MAH-g-PLA was used, wood fiber is well dispersed in the PLA matrix phase, and that the interfacial compatibility between the matrix and the enhanced phase was improved. Therefore, the addition of MAH-g-PLA could improve the interfacial compatibility of PLA/Wood fiber composites and improve the mechanical properties of the composites. MDPI 2017-11-09 /pmc/articles/PMC6418522/ /pubmed/30965894 http://dx.doi.org/10.3390/polym9110591 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Lei
Lv, Shanshan
Sun, Ce
Wan, Lu
Tan, Haiyan
Zhang, Yanhua
Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites
title Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites
title_full Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites
title_fullStr Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites
title_full_unstemmed Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites
title_short Effect of MAH-g-PLA on the Properties of Wood Fiber/Polylactic Acid Composites
title_sort effect of mah-g-pla on the properties of wood fiber/polylactic acid composites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6418522/
https://www.ncbi.nlm.nih.gov/pubmed/30965894
http://dx.doi.org/10.3390/polym9110591
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