Reactive blending of thermoplastic starch, epoxidized natural rubber and chitosan

[Display omitted] •Polymer blending of thermoplastic starch (TPS), epoxidized natural rubber (ENR) and chitosan (CTS).•Addition CTS was found to improve morphology, mechanical properties, wettability and reaction of the TPS/ENR/CTS blend.•Reaction between epoxy groups of ENR and amino groups of CTS....

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Bibliographic Details
Published in:European polymer journal 2016-11, Vol.84, p.292-299
Main Authors: Jantanasakulwong, Kittisak, Leksawasdi, Noppol, Seesuriyachan, Phisit, Wongsuriyasak, Somchai, Techapun, Charin, Ougizawa, Toshiaki
Format: Article
Language:English
Subjects:
Blends
Carbohydrates
Cassava
Chitosan
Chitosan (CTS)
Elongation
Epoxidized natural rubber (ENR)
Epoxy
Glycerol
Mechanical properties
Melt blending
Melts
Natural rubber
Reaction
Starches
Tensile strength
Thermoplastic resins
Thermoplastic starch (TPS)
Viscosity
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Summary:[Display omitted] •Polymer blending of thermoplastic starch (TPS), epoxidized natural rubber (ENR) and chitosan (CTS).•Addition CTS was found to improve morphology, mechanical properties, wettability and reaction of the TPS/ENR/CTS blend.•Reaction between epoxy groups of ENR and amino groups of CTS.•Reaction between the CTS and ENR improved properties of the TPS/ENR/CTS blend. Thermoplastic starch (TPS) was prepared by melt blending cassava starch and glycerol (70/30) at 140°C. Chitosan (CTS) was incorporated during TPS preparation. The TPS/CTS sample was melt blended with epoxidized natural rubber (ENR) at 140°C. In the TPS/ENR/CTS blend, adding CTS and ENR improved the tensile strength and elongation at break, respectively. Morphology of the TPS/ENR blend showed the dispersion of large-sized ENR particles in the TPS matrix. Adding CTS reduced the size of the ENR particles. Incorporating CTS also enhanced the melt viscosity of the blend, which suggested a reaction between CTS and ENR. FTIR confirmed that the amino groups of CTS reacted with the epoxy groups of ENR. This reaction between the CTS amino groups with the ENR epoxy groups improved the mechanical properties of the TPS/ENR/CTS blend.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2016.09.035