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Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer

[Image: see text] Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and cellulose acetate (CA) were blended in the presence of a plasticizer, i.e., triethyl citrate (TEC), and a chain extender, i.e., poly(styrene-acrylic-co-glycidyl methacrylate). To increase the ductility and impact properties of...

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Autores principales: Meereboer, Kjeld W., Pal, Akhilesh K., Misra, Manjusri, Mohanty, Amar K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7315424/
https://www.ncbi.nlm.nih.gov/pubmed/32596558
http://dx.doi.org/10.1021/acsomega.9b03369
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author Meereboer, Kjeld W.
Pal, Akhilesh K.
Misra, Manjusri
Mohanty, Amar K.
author_facet Meereboer, Kjeld W.
Pal, Akhilesh K.
Misra, Manjusri
Mohanty, Amar K.
author_sort Meereboer, Kjeld W.
collection PubMed
description [Image: see text] Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and cellulose acetate (CA) were blended in the presence of a plasticizer, i.e., triethyl citrate (TEC), and a chain extender, i.e., poly(styrene-acrylic-co-glycidyl methacrylate). To increase the ductility and impact properties of PHBV and to investigate a new biodegradable PHBV-based blend for sustainable packaging, CA was compatibilized with TEC. PHBV and plasticized CA (pCA) blends showed complete immiscibility through separate glass transition and melting peak temperatures in differential scanning calorimetry (DSC), despite the similar Hansen solubility parameters of PHBV, CA, and TEC, indicating partial miscibility. Phase separation between PHBV and pCA was clearly observed by scanning electron microscopy (SEM). PHBV/pCA (70:30) blends had improved impact strength, exceeding that of neat PHBV and pCA, which is attributed to PHBV porosity induced by degradation from the high processing temperature. During processing, the plasticizer migrated from CA to PHBV and partially plasticized it, as evidenced through DSC analysis. The melt temperature of PHBV was reduced, which was confirmed by double melting peaks, representing the formation of secondary crystallites at a lower temperature. Due to processing at high temperatures (210–220 °C), significant porosity was observed in the PHBV/pCA 30:70 blend in SEM analysis. Consequently, the impact strength was improved by 110% as compared to that of virgin PHBV. The addition of CE had no effect on the mechanical properties but did make the PHBV/pCA blends morphologically uniform.
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spelling pubmed-73154242020-06-26 Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer Meereboer, Kjeld W. Pal, Akhilesh K. Misra, Manjusri Mohanty, Amar K. ACS Omega [Image: see text] Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and cellulose acetate (CA) were blended in the presence of a plasticizer, i.e., triethyl citrate (TEC), and a chain extender, i.e., poly(styrene-acrylic-co-glycidyl methacrylate). To increase the ductility and impact properties of PHBV and to investigate a new biodegradable PHBV-based blend for sustainable packaging, CA was compatibilized with TEC. PHBV and plasticized CA (pCA) blends showed complete immiscibility through separate glass transition and melting peak temperatures in differential scanning calorimetry (DSC), despite the similar Hansen solubility parameters of PHBV, CA, and TEC, indicating partial miscibility. Phase separation between PHBV and pCA was clearly observed by scanning electron microscopy (SEM). PHBV/pCA (70:30) blends had improved impact strength, exceeding that of neat PHBV and pCA, which is attributed to PHBV porosity induced by degradation from the high processing temperature. During processing, the plasticizer migrated from CA to PHBV and partially plasticized it, as evidenced through DSC analysis. The melt temperature of PHBV was reduced, which was confirmed by double melting peaks, representing the formation of secondary crystallites at a lower temperature. Due to processing at high temperatures (210–220 °C), significant porosity was observed in the PHBV/pCA 30:70 blend in SEM analysis. Consequently, the impact strength was improved by 110% as compared to that of virgin PHBV. The addition of CE had no effect on the mechanical properties but did make the PHBV/pCA blends morphologically uniform. American Chemical Society 2020-06-11 /pmc/articles/PMC7315424/ /pubmed/32596558 http://dx.doi.org/10.1021/acsomega.9b03369 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Meereboer, Kjeld W.
Pal, Akhilesh K.
Misra, Manjusri
Mohanty, Amar K.
Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer
title Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer
title_full Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer
title_fullStr Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer
title_full_unstemmed Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer
title_short Sustainable PHBV/Cellulose Acetate Blends: Effect of a Chain Extender and a Plasticizer
title_sort sustainable phbv/cellulose acetate blends: effect of a chain extender and a plasticizer
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7315424/
https://www.ncbi.nlm.nih.gov/pubmed/32596558
http://dx.doi.org/10.1021/acsomega.9b03369
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