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Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites

Poly(lactic acid) (PLA) is a biodegradable plastic and grabs attention in several applications such as biomedical implantation, film, packaging and clothing. Instead, PLA itself has a characteristic of brittleness, resulting in poor mechanical properties, and its slow ability in degradation leads to...

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Main Authors: Norazlina, H., Kamal, Yusoh
Format: Article
Language:English
Published: Springer Berlin Heidelberg 2021
Subjects:
TJ Mechanical engineering and machinery
TP Chemical technology
Online Access:http://umpir.ump.edu.my/id/eprint/32605/1/Elucidating%20the%20plasticizing%20effect%20on%20mechanical%20and%20thermal%20properties%20.pdf
http://umpir.ump.edu.my/id/eprint/32605/
https://doi.org/10.1007/s00289-020-03471-2
https://doi.org/10.1007/s00289-020-03471-2
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spelling my.ump.umpir.326052022-01-05T03:37:25Z http://umpir.ump.edu.my/id/eprint/32605/ Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites Norazlina, H. Kamal, Yusoh TJ Mechanical engineering and machinery TP Chemical technology Poly(lactic acid) (PLA) is a biodegradable plastic and grabs attention in several applications such as biomedical implantation, film, packaging and clothing. Instead, PLA itself has a characteristic of brittleness, resulting in poor mechanical properties, and its slow ability in degradation leads to waste disposal problem. The present research aims to develop material in such a way to have a good combination of properties and optimum degradation ability. The PLA nanocomposites were prepared via melt blending that consisted of two types of carbon nanotubes (CNTs): unmodified carbon nanotubes (CNTs) and modified CNTs (mCNTs). The effect of 5 wt% poly (ethylene glycol) (PEG) as plasticizer on nanocomposites with CNTs material loading at 0.5 wt%, 1.0 wt%, 1.5 wt% and 2.0 wt% was studied. The analysis of physical properties was done using hardness testing and melt flow index (MFI). Neat PLA only gave around 69.0–77.6 Shore D in hardness test, while MFI exhibited around 36.1–39.4 g/10 min. PLA/mCNTs and PLA/PEG/mCNTs at 1.5 wt% exhibited the highest values of hardness testing which were 86.0 and 85.9 Shore D, respectively. In MFI study, the results were 70.0 g/10 min for PLA/mCNTs and 80.3 g/10 min for PLA/PEG/mCNTs. This proved that the PEG is useful in reducing the brittleness of nanocomposite. The full exfoliation of CNTs and mCNTs in the matrix observed from the X-ray diffraction analysis supported the excellent hardness and MFI properties. These nanocomposites also showed high thermal stability as obtained from differential scanning calorimetry and thermogravimetric analysis studies compared with neat PLA. The morphology study by field emission scanning electron microscopy analysis confirmed these findings through the existence of a smooth fracture surface, especially when PEG was loaded as evidence of good distribution of nanofiller in the matrix was established. Based on all analyses done, PLA/PEG/mCNTs were chosen as the good nanocomposite among others. Springer Berlin Heidelberg 2021-12 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/32605/1/Elucidating%20the%20plasticizing%20effect%20on%20mechanical%20and%20thermal%20properties%20.pdf Norazlina, H. and Kamal, Yusoh (2021) Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites. Polymer Bulletin, 78 (12). 6911 -6933. ISSN 0170-0839(Print); 1436-2449(Online) https://doi.org/10.1007/s00289-020-03471-2 https://doi.org/10.1007/s00289-020-03471-2
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TJ Mechanical engineering and machinery
TP Chemical technology
spellingShingle TJ Mechanical engineering and machinery
TP Chemical technology
Norazlina, H.
Kamal, Yusoh
Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites
description Poly(lactic acid) (PLA) is a biodegradable plastic and grabs attention in several applications such as biomedical implantation, film, packaging and clothing. Instead, PLA itself has a characteristic of brittleness, resulting in poor mechanical properties, and its slow ability in degradation leads to waste disposal problem. The present research aims to develop material in such a way to have a good combination of properties and optimum degradation ability. The PLA nanocomposites were prepared via melt blending that consisted of two types of carbon nanotubes (CNTs): unmodified carbon nanotubes (CNTs) and modified CNTs (mCNTs). The effect of 5 wt% poly (ethylene glycol) (PEG) as plasticizer on nanocomposites with CNTs material loading at 0.5 wt%, 1.0 wt%, 1.5 wt% and 2.0 wt% was studied. The analysis of physical properties was done using hardness testing and melt flow index (MFI). Neat PLA only gave around 69.0–77.6 Shore D in hardness test, while MFI exhibited around 36.1–39.4 g/10 min. PLA/mCNTs and PLA/PEG/mCNTs at 1.5 wt% exhibited the highest values of hardness testing which were 86.0 and 85.9 Shore D, respectively. In MFI study, the results were 70.0 g/10 min for PLA/mCNTs and 80.3 g/10 min for PLA/PEG/mCNTs. This proved that the PEG is useful in reducing the brittleness of nanocomposite. The full exfoliation of CNTs and mCNTs in the matrix observed from the X-ray diffraction analysis supported the excellent hardness and MFI properties. These nanocomposites also showed high thermal stability as obtained from differential scanning calorimetry and thermogravimetric analysis studies compared with neat PLA. The morphology study by field emission scanning electron microscopy analysis confirmed these findings through the existence of a smooth fracture surface, especially when PEG was loaded as evidence of good distribution of nanofiller in the matrix was established. Based on all analyses done, PLA/PEG/mCNTs were chosen as the good nanocomposite among others.
format Article
author Norazlina, H.
Kamal, Yusoh
author_facet Norazlina, H.
Kamal, Yusoh
author_sort Norazlina, H.
title Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites
title_short Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites
title_full Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites
title_fullStr Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites
title_full_unstemmed Elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites
title_sort elucidating the plasticizing effect on mechanical and thermal properties of poly(lactic acid)/carbon nanotubes nanocomposites
publisher Springer Berlin Heidelberg
publishDate 2021
url http://umpir.ump.edu.my/id/eprint/32605/1/Elucidating%20the%20plasticizing%20effect%20on%20mechanical%20and%20thermal%20properties%20.pdf
http://umpir.ump.edu.my/id/eprint/32605/
https://doi.org/10.1007/s00289-020-03471-2
https://doi.org/10.1007/s00289-020-03471-2
_version_ 1724073488536305664
score 13.211869

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