Thermophysical properties and rheology of PHB/lignin blends

Mousavioun, Payam, Halley, Peter J. and Doherty, William O. S. (2013) Thermophysical properties and rheology of PHB/lignin blends. Industrial Crops and Products, 50 270-275. doi:10.1016/j.indcrop.2013.07.026

Author Mousavioun, Payam
Halley, Peter J.
Doherty, William O. S.
Title Thermophysical properties and rheology of PHB/lignin blends
Journal name Industrial Crops and Products   Check publisher's open access policy
ISSN 0926-6690
Publication date 2013-10-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.indcrop.2013.07.026
Volume 50
Start page 270
End page 275
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
The thermal and rheological properties of poly(hydroxybutyrate) (PHB) and lignin blends were investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and rheological analysis over the entire range of composition. The drop in the apparent energy of activation of decomposition, Ea from 112kJmol-1 for pure PHB to half that value with PHB/lignin blends, suggests that the addition lignin reduces the thermal stability of PHB. The rheology results show that for ≤30wt% lignin, lignin behaved like a plasticizer forming a single phase with PHB (as shown by glass transition data and scanning electron micrographs), and reduced the elasticity and viscosity relative to pure PHB. Further additions of lignin (e.g., 60wt% lignin) result in phase separation and thus decreased the ability of the blends to dissipate energy and increased the viscosities of the blends.
Keyword Biodegradable polymer
Polymer processing
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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