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Open AccessArticle

Polyvinyl Alcohol Microspheres Reinforced Thermoplastic Starch Composites

by Bin Guo 1,2,3,*, Dongdong Zha 1, Bengang Li 1, Peng Yin 1 and Panxin Li 2,3
1
College of Science, Nanjing Forestry University, Nanjing 210037, China
2
Agricultural and Forest Products Processing Academician Workstation of Henan Province, Luohe 462600, China
3
Post-Doctoral Research Center of Henan Nanjiecun Group, Luohe 462600, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(4), 640; https://doi.org/10.3390/ma11040640
Received: 18 March 2018 / Revised: 18 April 2018 / Accepted: 19 April 2018 / Published: 21 April 2018
(This article belongs to the Section Advanced Composites)
We reported a new method to prepare polyvinyl alcohol (PVA)/thermoplastic starch (TPS) composites by using polyvinyl alcohol microspheres (PVAMS). The PVAMS/TPS composites were characterized using tensile test, scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA) and thermogravimetric analysis (TGA). The results exhibited that adding small amounts of PVAMSs can effectively improve the mechanical strength and toughness of the composites, especially for the 1 wt %PVAMS in TPS matrix, with a tensile strength of 3.5 MPa, an elongation at break at 71.73% and an impact strength of 33.4 kJ/m2. Furthermore, the SEM and shift in the tan δ peak (Tα and Tβ) at the maximum value of 69.87 and −36.52 °C indicates that the PVAMS decreased the mobility of the amorphous starch molecules due to the strong intermolecular hydrogen bonds between PVAMS and TPS. The peak temperature of maximum decomposition rate (Tp) of 1 wt % PVAMS/TPS composites increased about 5 °C compared with TPS in TGA curves. View Full-Text
Keywords: polyvinyl alcohol microspheres; thermoplastic starch; composites polyvinyl alcohol microspheres; thermoplastic starch; composites
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MDPI and ACS Style

Guo, B.; Zha, D.; Li, B.; Yin, P.; Li, P. Polyvinyl Alcohol Microspheres Reinforced Thermoplastic Starch Composites. Materials 2018, 11, 640.

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