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Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials

Plasticized poly (lactic acid) (PPLA) was prepared by melt blending poly (lactic acid) (PLA) with 10 wt% of poly (ethylene glycol) (PEG), with varied molecular weights range from 400 to 4000. The structure, thermal property, morphology, and surface free energy of the PPLA were investigated by Fourie...

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Autores principales: Li, Decai, Jiang, Yang, Lv, Shanshan, Liu, Xiaojing, Gu, Jiyou, Chen, Qifeng, Zhang, Yanhua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5832258/
https://www.ncbi.nlm.nih.gov/pubmed/29494654
http://dx.doi.org/10.1371/journal.pone.0193520
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author Li, Decai
Jiang, Yang
Lv, Shanshan
Liu, Xiaojing
Gu, Jiyou
Chen, Qifeng
Zhang, Yanhua
author_facet Li, Decai
Jiang, Yang
Lv, Shanshan
Liu, Xiaojing
Gu, Jiyou
Chen, Qifeng
Zhang, Yanhua
author_sort Li, Decai
collection PubMed
description Plasticized poly (lactic acid) (PPLA) was prepared by melt blending poly (lactic acid) (PLA) with 10 wt% of poly (ethylene glycol) (PEG), with varied molecular weights range from 400 to 4000. The structure, thermal property, morphology, and surface free energy of the PPLA were investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and contact angles (CA). The resulting PPLA results indicated that the introduction of PEG to the blend systems resulted in a ductile fracture, a decrease in the melt temperature (T(m)) and glass transfer temperature (T(g)), and an increase in the degree of crystallization (χ(c)), which indicated an improved flexibility. In addition, the polarity of the PPLA increased and the surface free energy decreased. The resulting PPLA was subsequently used as matrix to blend with wood flour to prepare composites. The mechanical strength, melting behavior, thermal stability, and microscopy of the PPLA/wood flour composites were also evaluated. These results illustrated that the plasticized PPLA matrix was beneficial to the interfacial compatibility between the polar filler and the substrate.
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spelling pubmed-58322582018-03-23 Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials Li, Decai Jiang, Yang Lv, Shanshan Liu, Xiaojing Gu, Jiyou Chen, Qifeng Zhang, Yanhua PLoS One Research Article Plasticized poly (lactic acid) (PPLA) was prepared by melt blending poly (lactic acid) (PLA) with 10 wt% of poly (ethylene glycol) (PEG), with varied molecular weights range from 400 to 4000. The structure, thermal property, morphology, and surface free energy of the PPLA were investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and contact angles (CA). The resulting PPLA results indicated that the introduction of PEG to the blend systems resulted in a ductile fracture, a decrease in the melt temperature (T(m)) and glass transfer temperature (T(g)), and an increase in the degree of crystallization (χ(c)), which indicated an improved flexibility. In addition, the polarity of the PPLA increased and the surface free energy decreased. The resulting PPLA was subsequently used as matrix to blend with wood flour to prepare composites. The mechanical strength, melting behavior, thermal stability, and microscopy of the PPLA/wood flour composites were also evaluated. These results illustrated that the plasticized PPLA matrix was beneficial to the interfacial compatibility between the polar filler and the substrate. Public Library of Science 2018-03-01 /pmc/articles/PMC5832258/ /pubmed/29494654 http://dx.doi.org/10.1371/journal.pone.0193520 Text en © 2018 Li et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Li, Decai
Jiang, Yang
Lv, Shanshan
Liu, Xiaojing
Gu, Jiyou
Chen, Qifeng
Zhang, Yanhua
Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials
title Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials
title_full Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials
title_fullStr Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials
title_full_unstemmed Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials
title_short Preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials
title_sort preparation of plasticized poly (lactic acid) and its influence on the properties of composite materials
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5832258/
https://www.ncbi.nlm.nih.gov/pubmed/29494654
http://dx.doi.org/10.1371/journal.pone.0193520
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