Journal
CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY
Volume 29, Issue 2, Pages 221-246Publisher
CROATIAN SOC CHEMICAL ENGINEERING TECHNOLOGY
DOI: 10.15255/CABEQ.2014.2257
Keywords
polyhydroxybutyrate-co-valerate; polylactic acid; blends; miscibility; mechanical properties; barrier properties
Funding
- research association, 'Industrievereinigung fur Lebensmitteltechnologie und Verpackung e.V.'
- 'AiF' under the program of industrial research of the 'Industrielle Gemeinschaftsforschung (IGF)' of the 'Bundesministerium fur Wirtschaft und Energie' [IGF-Vorhaben 16115 N]
Ask authors/readers for more resources
Biopolymers for packaging applications offer many advantages and are therefore of increasing interest. In order to develop a sustainable alternative for petrochemical-based polymers the biobased and biodegradable polymers, the focus of this work are polyhydroxybutyrate-co-valerate (PHBV) and polylactic acid (PLA) (and copolymers). Blending of these two biopolymers was reviewed under thermodynamic aspects and backed with own results. Additionally, different ways of improving the miscibility were performed by compatibilisers, peroxides, transesterification catalysts, and by blending PHBV with modified molecular weight. These blends were extruded as cast films, and characterised by means of mechanical and barrier properties. This study analyses the miscibility of PLA and PHB-copolyester (with approximately equal molar masses) and reports on the unusually high barrier properties in PLA and PHBV blends. However, the quality of blending, especially regarding barrier properties to interphase boundaries, depends on the compatibility of the components and the morphology of the blend. Our results suggest that a PHBV content of 20-35 % in PLA is the most suitable blend system in terms of compatibility and high barrier properties.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available