Abstract
Nanocomposites composed of a water-soluble nylon (P-70, polyalkyleneoxide-modified poly(ɛ-caprolactum), and chitin nanofibers (ChNFs) were prepared by a casting method of the aqueous resin/fiber dispersion. P-70 was crosslinked with a resol-type phenolic resin (PR) and its ChNF nanocomposites were prepared to provide water resistance. The P-70/PR and P-70/PR/ChNF exhibited excellent water-resistance. The FT-IR analysis revealed that the crosslinked structure was formed by the reaction of amide groups of P-70 and methylol groups of PR. The glass transition temperature (Tg) of P-70/PR increased with increasing PR content, whereas the dispersion of ChNFs was deteriorated. Although the addition of ChNF to P-70 hardly affected the Tg, the addition of ChNF to P-70/PR caused a lowering of Tg. The tensile strength and modulus for P-70/ChNF nanocomposites increased with increasing ChNF content. The tensile strength of P-70/PR was lower than that of P-70, which increased by the addition of ChNF.
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Acknowledgements
We thank Dr. Naozumi Teramoto and Dr. Toshiaki Shimasaki of our department for the helpful suggestions. We are also grateful to Mr. Ryusuke Osada of Material Analysis Center of our university for assisting in measuring FE-SEM.
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Kobayashi, R., Shibata, M. Preparation and properties of nanocomposites composed of a water-soluble nylon and chitin nanofibers. J Polym Res 26, 168 (2019). https://doi.org/10.1007/s10965-019-1834-1
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DOI: https://doi.org/10.1007/s10965-019-1834-1