Preparation and properties of thermoplastic poly(caprolactone) composites containing high amount of esterified starch without plasticizer

Carbohydrate Polymers
Yujie SunMingqing Chen

Abstract

Based on stearyl chloride and native starch, esterified starch were prepared and the chemical structure was characterized by (1)H NMR and FTIR. It was found that stearyl chloride was an efficient agent to fabricate esterified starch with high degree of substitution (DS). During the melt blending of esterified starch (80 wt%) and poly(caprolactone) (PCL, 20 wt%), it was shown the torque of PCL/esterified starch was much lower than that of PCL/native starch without any plasticizer, and further decreased with increasing DS. Compared with PCL/native starch, the tensile properties of PCL/esterified starch composites were significantly enhanced. The tensile strength and elongation at break were increased from 2.7 MPa to 56% for PCL/native starch composites to 9.1 MPa and 626% for PCL/esterified starch ones with DS of 1.50, respectively. SEM observation revealed the esterified starch particles in matrix became smaller and more uniform. In addition, the water resistance and hydrophobic character of PCL/esterified starch composites were improved. PCL composites containing 80 wt% esterified starch with favorable mechanical properties would have great potential applications in broad areas.

References

Jul 1, 1991·Neurobiology of Aging·J W Geddes, C W Cotman
Mar 15, 2006·Biomacromolecules·Mats ThunwallMikael Rigdahl
Sep 10, 2014·Journal of Biomedical Materials Research. Part a·Manlio BarbarisiAlfonso Barbarisi
Jan 27, 2015·ACS Applied Materials & Interfaces·Luca CeseracciuIlker S Bayer

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Citations

May 10, 2017·Materials Science & Engineering. C, Materials for Biological Applications·Wenqiang TanZhanyong Guo
Oct 19, 2017·Toxicological Sciences : an Official Journal of the Society of Toxicology·Anne Kokel, Béla Török

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