Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Flow Behaviour and Microstructure of a β-Glucan Concentrate
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience.
RISE - Research Institutes of Sweden, Bioscience and Materials, Agrifood and Bioscience. Chalmers University of Technology, Sweden.
Show others and affiliations
2018 (English)In: Journal of polymers and the environment, ISSN 1566-2543, E-ISSN 1572-8919Article in journal (Refereed) In press
Abstract [en]

The extensional viscosity is an important rheological characteristic of polymer melts. It is however not as frequently reported on as the shear viscosity. The extensional viscosity is of special interest when considering polymeric materials for foaming and film blowing processes. Here, the extensional (and shear) viscosity along with the melt strength and the tensile properties of the corresponding solid film of a β-glucan concentrate are reported on. A capillary viscometer equipped with a hyperbolic die, yielding a contraction flow, was used to assess the extensional viscosity of the aqueous β-glucan compound at room temperature and at elevated temperatures (110 and 130 °C). In general, the extensional viscosity as well as the shear viscosity decreased with increasing deformation rate. The influence of two different amounts of added water (40 and 50%) was also examined. As expected, both types of viscosities decreased with increasing temperature. It is suggested that gelatinization of the starch fraction in the concentrate at 110 and 130 °C contributes to temperature dependence of the viscosity. To some extent, this is supported by light microscopy and confocal scanning laser microscopy studies of the microstructure of the materials. The results reported here indicate that the β-glucan concentrate might, after some modifications, be used as a complement to fossil-based polymers and processed by conventional manufacturing techniques. 

Place, publisher, year, edition, pages
2018.
Keyword [en]
Extensional viscosity, Hemicellulose, Mechanical properties, Rheology, Starch, Gelation, Polymer melts, Shear viscosity, Temperature distribution, Capillary viscometers, Confocal scanning laser microscopy, Conventional manufacturing, Increasing temperatures, Rheological characteristics, Temperature dependence, Microstructure
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33509DOI: 10.1007/s10924-018-1207-6Scopus ID: 2-s2.0-85043363659OAI: oai:DiVA.org:ri-33509DiVA, id: diva2:1192804
Available from: 2018-03-23 Created: 2018-03-23 Last updated: 2018-03-23Bibliographically approved

Open Access in DiVA

fulltext(1333 kB)3 downloads
File information
File name FULLTEXT01.pdfFile size 1333 kBChecksum SHA-512
96b03ec2c3ca7ee8ea0057afeae6372683d3a2e9aec1a54d1191b8c4e39ce7097704ef12a57f70f4dd93f17aa9c7ab78bbdea0c1ff2afb2d05ff9a45d00f663e
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus
By organisation
Agrifood and Bioscience
In the same journal
Journal of polymers and the environment
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 3 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 9 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.32.0