Plasticizing and anti-plasticizing effects of polyvinyl alcohol in blend with thermoplastic starch.

Clicks: 180
ID: 17971
2019
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Ranked #177 of 200 articles by views in International journal of biological macromolecules

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Abstract
Thermoplastic starch (TPS) and polyvinyl alcohol (PVA) blends were prepared by extrusion method in the presence of water/glycerol and citric acid, and their phase behavior was investigated. Results of scanning electron microscopy (SEM) and X-ray diffractometry (XRD) tests demonstrated the complete plasticization of starch during the melt mixing. PVA crystal phase was not formed in blends with less than 50 wt% PVA. Fourier-transform infrared spectroscopy (FTIR) and dynamic mechanical analysis (DMA) analysis revealed high compatibility between two phases, starch and PVA. Addition of PVA to TPS resulted in the reduction of the glass transition temperature and dynamic moduli and improvement of sample flexibility. However, at 10 wt% PVA, an anti-plasticization effect caused to increase the Tg and storage modulus of the blend.
Reference Key
kahvand2019plasticizinginternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Kahvand, Fatemeh;Fasihi, Mohammad;
Journal International journal of biological macromolecules
Year 2019
DOI
S0141-8130(19)35656-9
URL
Keywords Keywords not found

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