This preprint is under consideration at Journal of Polymers and the Environment. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
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Research Article
Naima Belhaneche-Bensemra
Ecole Nationale Polytechnique
Corresponding Author
ORCiD: https://orcid.org/0000-0001-9315-8701
License:
This work is licensed under a CC BY 4.0 License. Read Full License
This study aims to improve the ductility of poly (lactic acid) (PLA). For that purpose, bioblends based on PLA and epoxidized vegetable oils (EVO) as bioplasticizers were prepared. Commercial sunflower oil was epoxidized and epoxidized sunflower oil (ESO) was used as plasticizer for PLA. To investigate ESO potential as plasticizer for PLA, its plasticizing effect was compared with commercial epoxidized soya bean oil (ESBO). The plasticizers (ESO or ESBO) were respectively compounded with PLA at 10, 20, 30, and 40 wt%. Mechanical (tensile and Shore D hardness), thermal (differential scanning calorimetry (DSC), thermogravimetric analysis (TGA)) and morphological properties (optical microscopy and scanning electron microscopy (SEM)) were characterized. The results showed that the addition of ESO or ESBO to PLA decreased tensile strength and tensile modulus compared to neat PLA but increased elongation at break for which an optimum (9.02%, 15.55% and 33.67% for ESBO, ESO5.5% and ESO6.5% respectively) was reached at a content of 20 wt% of plasticizer. The structures of the obtained plasticized PLA were confirmed by FTIR spectroscopy. DSC showed a clear decrease in the glass transition temperature of PLA and SEM analysis proved successful modification on the PLA brittle morphology with addition of EVO. On the other hand, TGA results revealed significant increase in the thermal stability. Based on the results of this study, ESO exhibited promising results regarding
Keywords
Poly(lactic acid), epoxidized sunflower oil, epoxidized soya bean oil, bioplasticizer
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This is a list of supplementary files associated with this preprint. Click to download.
- Scheme01.png
Scheme 1: Schematic representation of epoxidation reaction ([1] Formic acid; [2] Hydrogen peroxide; [3] Performic acid; [4] Double bond of SO; [5] Epoxy group of ESO).
- Scheme02.png
Scheme 2 Proposed chemical interactions between PLA and epoxidized vegetable oils.
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This preprint is under consideration at Journal of Polymers and the Environment. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Naima Belhaneche-Bensemra
Ecole Nationale Polytechnique
Corresponding Author
ORCiD: https://orcid.org/0000-0001-9315-8701
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 18 Mar, 2021
No community comments so far
Review #? received
Received 10 Mar, 2021
Reviewers invited
Invitations sent on 09 Mar, 2021
Editor assigned
On 04 Mar, 2021
First submitted
On 03 Mar, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
This study aims to improve the ductility of poly (lactic acid) (PLA). For that purpose, bioblends based on PLA and epoxidized vegetable oils (EVO) as bioplasticizers were prepared. Commercial sunflower oil was epoxidized and epoxidized sunflower oil (ESO) was used as plasticizer for PLA. To investigate ESO potential as plasticizer for PLA, its plasticizing effect was compared with commercial epoxidized soya bean oil (ESBO). The plasticizers (ESO or ESBO) were respectively compounded with PLA at 10, 20, 30, and 40 wt%. Mechanical (tensile and Shore D hardness), thermal (differential scanning calorimetry (DSC), thermogravimetric analysis (TGA)) and morphological properties (optical microscopy and scanning electron microscopy (SEM)) were characterized. The results showed that the addition of ESO or ESBO to PLA decreased tensile strength and tensile modulus compared to neat PLA but increased elongation at break for which an optimum (9.02%, 15.55% and 33.67% for ESBO, ESO5.5% and ESO6.5% respectively) was reached at a content of 20 wt% of plasticizer. The structures of the obtained plasticized PLA were confirmed by FTIR spectroscopy. DSC showed a clear decrease in the glass transition temperature of PLA and SEM analysis proved successful modification on the PLA brittle morphology with addition of EVO. On the other hand, TGA results revealed significant increase in the thermal stability. Based on the results of this study, ESO exhibited promising results regarding
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
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