Study on Structure and Physico-chemical Properties of Surficial Epoxidized Deproteinized Natural Rubber/silica blend
Main Article Content
Abstract
The blends of epoxidized natural rubber/silica were prepared and characterized the properties which are necessary for the coating application. The epoxidized natural rubber was prepared by epoxidation of deproteinized natural rubber with fresh peracetic acid in latex stage. The blends of epoxidized natural rubber and silica were prepared from epoxidized natural rubber latex and tetraethyl orthosilicate. The structural characterization of products was carried out through latex state NMR and FT-IR spectroscopy and SEM observation. The contact angle of water drop on the surface of the blends and water uptake were investigated. The results from structural characterization showed that epoxy group was successfully introduced to natural rubber chain and silica particle was formed in epoxidized natural rubber matrix. The blend of epoxidized natural rubber containing 15 %mol of epoxy group content and 5 %w/w of tetraethyl orthosilicate was found to attain the highest hydrophobicity.
Keywords
Epoxidized natural rubber, Silica, Structural characterization, Surficial physico-chemical properties
Article Details
References
[1] I. R. Gelling; Epoxidised natural rubber; J. Nat. Rubb. Res. 6 (1991) 184-205.
[2] R. Yoksan; Epoxidized natural rubber for adhesive applications; Thailand J. Nat. Sci. 42 (2008) 325-332.
[3] T. Saito, W. Klinklai, S. Kawahara; Characterization of epoxidized natural rubber by 2D NMR spectroscopy; Polymer 48 (2007) 750-757.
[4] Y. Heping, L. Sidong, P. Zheng; Preparation and study of epoxidized natural rubber; J. Therm. Anal. Calorim. 58 (1999) 293-299.
[5] A. S. Hashim, N. Kawabata, S. Kohjiya; Silica reinforcement of epoxidized natural rubber by the sol-gel method; J. Sol-gel Sci. Technol. 5 (1995) 211-218.
[6] A. Bandyopadhyay, M. D. Sarkar, A. K. Bhowmick; Epoxidized natural rubber/silica nanoscale organic-inorganic hybrid composites prepared by sol-gel technique; Rubb. Chem. Technol. 77 (2004) 830-846.
[7] J. C. Randall; Polymer sequence determination carbon-13 NMR method; Academic Press, New York, 1977.
[8] T. Xu, Z. Jia, Y. Luo, D. Jia, Z. Peng; Interfacial interaction between the epoxidized natural rubber and silica in natural rubber/silica nanocomposites; Appl. Surf. Sci. 328 (2015) 206-213.
[9] Y. Y. Luo, Y. Q. Wang, J. P. Zhong, C. Z. He, Y. Z. Li, Z. Peng; Interaction between fumed-silica and epoxidized natural rubber; J. Inorg. Org. Polym. Mater. 21 (2001) 777-783.
[2] R. Yoksan; Epoxidized natural rubber for adhesive applications; Thailand J. Nat. Sci. 42 (2008) 325-332.
[3] T. Saito, W. Klinklai, S. Kawahara; Characterization of epoxidized natural rubber by 2D NMR spectroscopy; Polymer 48 (2007) 750-757.
[4] Y. Heping, L. Sidong, P. Zheng; Preparation and study of epoxidized natural rubber; J. Therm. Anal. Calorim. 58 (1999) 293-299.
[5] A. S. Hashim, N. Kawabata, S. Kohjiya; Silica reinforcement of epoxidized natural rubber by the sol-gel method; J. Sol-gel Sci. Technol. 5 (1995) 211-218.
[6] A. Bandyopadhyay, M. D. Sarkar, A. K. Bhowmick; Epoxidized natural rubber/silica nanoscale organic-inorganic hybrid composites prepared by sol-gel technique; Rubb. Chem. Technol. 77 (2004) 830-846.
[7] J. C. Randall; Polymer sequence determination carbon-13 NMR method; Academic Press, New York, 1977.
[8] T. Xu, Z. Jia, Y. Luo, D. Jia, Z. Peng; Interfacial interaction between the epoxidized natural rubber and silica in natural rubber/silica nanocomposites; Appl. Surf. Sci. 328 (2015) 206-213.
[9] Y. Y. Luo, Y. Q. Wang, J. P. Zhong, C. Z. He, Y. Z. Li, Z. Peng; Interaction between fumed-silica and epoxidized natural rubber; J. Inorg. Org. Polym. Mater. 21 (2001) 777-783.