Influence of Reaction Conditions on the Properties of Nano-matrix Structure Formed by Graft-Copolymerization of Acrylonitrile onto Natural Rubber

Abstract:

Natural rubber (NR) is one of the most important agriculture products of Thailand, which is an important material with unique and special characteristics used in wide range of applications such as mechanical properties, excellent strength, and elasticity. However, it is inferior in oil resistance due to the presence of hydrogen and carbon in its structure. This inherent drawback of NR has limited its application in industry. In order to expand the use of NR, this research is interested to improve the oil resistance of NR without loss of outstanding properties by grafting NR with acrylonitrile (AN) monomer to form the nano-matrix structure. The influences of the initial monomer concentration and initial initiator concentration were investigated. These effects on structure, mechanical properties and oil resistance properties were studied by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy, tensile machine, and swelling in toluene, respectively. It was found that the tensile strength and oil resistance properties of graft copolymerization of AN onto NR increased with increasing the percentage grafting efficiency of acrylonitrile monomer.

• Periodical: Advanced Materials Research (Volume 844)
• Pages: 365-368
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.844.365
• Online since: November 2013
• Authors: Kontapond Prukkaewkanjana, Seiichi Kawahara, Jitladda Sakdapipanich
• Keywords: Acrylonitrile, Graft-Copolymerization, Nanomatrix Structure, Natural Rubber (NR)

References

[1] Pukkate N, Kitai T, Yamamoto Y, Kawazura T, Sakdapipanich J, Kawahara S. Nano-matrix structure formed by graft-copolymerization of styrene onto natural rubber. European Polymer Journal 43 (2007) 3208–3214.

DOI: 10.1016/j.eurpolymj.2007.04.037

[2] Kawahara S, Kawazura T, Sawada T, Isono Y. Preparation and characterization of natural rubber dispersed in nano-matrix. Polymer 44 (2003) 4527–4531.

DOI: 10.1016/s0032-3861(03)00415-4

[3] Ho C. C, Kondo T, Muramatsu N, Ohshima H.J. Colloid Interface Sci 178 (1996) 442-445.

[4] Eslami Farsani R, Raissi S, Shokuhfar A, Sedghi A. FT-IR Study of Stabilized PAN Fibers for Fabrication of Carbon Fibers. World Academy of Science, Engineering and Technology 50 (2009) 430-433.

[5] Teeranuch K, Pattarapan P, Suda K. Effects of Redox Initiator on Graft Copolymerization of Methyl Methacrylate onto Natural Rubber. Journal of Applied Polymer Science 101 (2006) 2587–2601.

DOI: 10.1002/app.23997