Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 134, Issue 16, Pages -Publisher
WILEY
DOI: 10.1002/app.44743
Keywords
blends; poly(lactic acid); starch; wood flour
Categories
Funding
- Fundamental Research Funds for the Central Universities [2572016DB01, 2572016AB17]
- National Forestry Public Welfare Industry major projects of scientific research [201504502]
- China Postdoctoral Science Foundation [LBH-TZ0610]
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An entirely biosourced blend composed of poly(lactic acid) (PLA), starch, and wood flour (WF) was prepared by a co-extruder with glycerol as a plasticizer. The morphology, rheological properties, and mechanical properties of the WF/starch/PLA blends were comprehensively analyzed. The results showed that with the decrease of the starch/WF ratio, the morphology experienced a large transformation, and the compatibility of the blends was found to be superior to other blends, with a starch/wood flour ratio of 7/3. The dynamic mechanical thermal analysis (DMA) results demonstrated the incompatibility of the components in WF/starch/PLA blends. Following the decrease of the starch/WF ratio, the storage modulus (G '') and the complex viscosity (eta*) of the blends increased. The mechanical strength first increased, and then decreased with the increase of the WF concentration. The water absorption results showed that the water resistance of the blends was reduced with the lower starch/WF ratio. (C) 2017 Wiley Periodicals, Inc.
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