Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure

Biobased and biodegradable polyhydroxyalkanoates (PHAs) have great potential as sustainable packaging materials. However, improvements in their processing and mechanical properties are necessary. In this work, the influence of melt processing conditions on the mechanical properties and microstructur...

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Autores principales:	Chris Vanheusden, Pieter Samyn, Bart Goderis, Mouna Hamid, Naveen Reddy, Anitha Ethirajan, Roos Peeters, Mieke Buntinx
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polyhydroxyalkanoates poly(3-hydroxybutyrate-co-3-hydroxyhexanoate melt processing extrusion injection molding mechanical properties Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/b0f032448d704fc18db13108b85d439c
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spelling	oai:doaj.org-article:b0f032448d704fc18db13108b85d439c2021-11-25T18:49:23ZExtrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure10.3390/polym132240122073-4360https://doaj.org/article/b0f032448d704fc18db13108b85d439c2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/4012https://doaj.org/toc/2073-4360Biobased and biodegradable polyhydroxyalkanoates (PHAs) have great potential as sustainable packaging materials. However, improvements in their processing and mechanical properties are necessary. In this work, the influence of melt processing conditions on the mechanical properties and microstructure of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) is examined using a full factorial design of experiments (DoE) approach. We have found that strict control over processing temperature, mold temperature, screw speed, and cooling time leads to highly increased elongation at break values, mainly under influence of higher mold temperatures at 80 °C. Increased elongation of the moldings is attributed to relaxation and decreased orientation of the polymer chains together with a homogeneous microstructure at slower cooling rates. Based on the statistically substantiated models to determine the optimal processing conditions and their effects on microstructure variation and mechanical properties of PHBHHx samples, we conclude that optimizing the processing of this biopolymer can improve the applicability of the material and extend its scope in the realm of flexible packaging applications.Chris VanheusdenPieter SamynBart GoderisMouna HamidNaveen ReddyAnitha EthirajanRoos PeetersMieke BuntinxMDPI AGarticlepolyhydroxyalkanoatespoly(3-hydroxybutyrate-co-3-hydroxyhexanoatemelt processingextrusioninjection moldingmechanical propertiesOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 4012, p 4012 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyhydroxyalkanoates poly(3-hydroxybutyrate-co-3-hydroxyhexanoate melt processing extrusion injection molding mechanical properties Organic chemistry QD241-441
spellingShingle	polyhydroxyalkanoates poly(3-hydroxybutyrate-co-3-hydroxyhexanoate melt processing extrusion injection molding mechanical properties Organic chemistry QD241-441 Chris Vanheusden Pieter Samyn Bart Goderis Mouna Hamid Naveen Reddy Anitha Ethirajan Roos Peeters Mieke Buntinx Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure
description	Biobased and biodegradable polyhydroxyalkanoates (PHAs) have great potential as sustainable packaging materials. However, improvements in their processing and mechanical properties are necessary. In this work, the influence of melt processing conditions on the mechanical properties and microstructure of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) is examined using a full factorial design of experiments (DoE) approach. We have found that strict control over processing temperature, mold temperature, screw speed, and cooling time leads to highly increased elongation at break values, mainly under influence of higher mold temperatures at 80 °C. Increased elongation of the moldings is attributed to relaxation and decreased orientation of the polymer chains together with a homogeneous microstructure at slower cooling rates. Based on the statistically substantiated models to determine the optimal processing conditions and their effects on microstructure variation and mechanical properties of PHBHHx samples, we conclude that optimizing the processing of this biopolymer can improve the applicability of the material and extend its scope in the realm of flexible packaging applications.
format	article
author	Chris Vanheusden Pieter Samyn Bart Goderis Mouna Hamid Naveen Reddy Anitha Ethirajan Roos Peeters Mieke Buntinx
author_facet	Chris Vanheusden Pieter Samyn Bart Goderis Mouna Hamid Naveen Reddy Anitha Ethirajan Roos Peeters Mieke Buntinx
author_sort	Chris Vanheusden
title	Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure
title_short	Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure
title_full	Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure
title_fullStr	Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure
title_full_unstemmed	Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure
title_sort	extrusion and injection molding of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (phbhhx): influence of processing conditions on mechanical properties and microstructure
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b0f032448d704fc18db13108b85d439c
work_keys_str_mv	AT chrisvanheusden extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure AT pietersamyn extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure AT bartgoderis extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure AT mounahamid extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure AT naveenreddy extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure AT anithaethirajan extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure AT roospeeters extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure AT miekebuntinx extrusionandinjectionmoldingofpoly3hydroxybutyrateco3hydroxyhexanoatephbhhxinfluenceofprocessingconditionsonmechanicalpropertiesandmicrostructure
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Extrusion and Injection Molding of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) (PHBHHx): Influence of Processing Conditions on Mechanical Properties and Microstructure

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