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Assessing the thermoformability of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/poly(acid lactic) blends compatibilized with diisocyanates
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknologi.
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2017 (Engelska)Ingår i: Polymer testing, ISSN 0142-9418, E-ISSN 1873-2348, Vol. 62, s. 235-245Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is a renewable alternative to conventional barrier packaging polymers due to its thermoplastic properties, biodegradability and gas barrier performance but its potential industrial applications are limited by its high price and difficult processability. A thorough study concerning the thermoforming ability of PHBV, and blends with poly(lactic acid) (PLA) incorporating three different diisocyanates as compatibilizers (hexamethylene diisocyanate, poly(hexamethylene) diisocyanate and 1,4-phenylene diisocyanate) is herein presented after component melt blending. A straightforward universal qualitative method is proposed to assess the thermoformability, based on a visual inspection of a thermoformed specimen and the ability to reproduce the mold shape, and the thermoforming window of the material. The results reveal a significant improvement in the thermoforming capacity and a widening of the thermoforming windows as the correct amounts of diisocyanates are incorporated. The barrier properties and the biodisintegrability of the blends was also studied, confirming a predictable slight decrease of the barrier performance when PLA is added, but without negatively affecting the disintegrability under composting conditions with respect to pristine PHBV.

Ort, förlag, år, upplaga, sidor
Elsevier, 2017. Vol. 62, s. 235-245
Nyckelord [en]
Biodegradability, Biodegradable polymers, Blending, Cyclohexane, Barrier performance, Barrier properties, Composting conditions, Hexamethylene diisocyanate, Poly(3-hydroxybutyrate-co-3-hydroxyvalerate), Qualitative method, Thermoformabilities, Thermoplastic properties, Thermoforming
Nationell ämneskategori
Polymerteknologi
Identifikatorer
URN: urn:nbn:se:kth:diva-212246DOI: 10.1016/j.polymertesting.2017.06.026ISI: 000411537900030Scopus ID: 2-s2.0-85023633375OAI: oai:DiVA.org:kth-212246DiVA, id: diva2:1133999
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QC 20170817

Tillgänglig från: 2017-08-17 Skapad: 2017-08-17 Senast uppdaterad: 2017-10-16Bibliografiskt granskad

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Olsson, Richard T.
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Fiber- och polymerteknologi
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