Hydrogenation of Epoxidized Natural Rubber

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วารุณี กลิ่นไกล
เซอิชิ คาวาฮา


Hydrogenation of natural rubber (NR) is an important technique to improve properties of the rubber. i.e. good aging resistance and high temperature usage. This has been carried out in diene elastomer by conversion of an unsaturated polymer to a saturated polymer using homogeneous and heterogeneous catalyst. However. hydrogenation of functionalized rubbers such as epoxidized NR, is quite difficult due to the functional groups interfere during the reaction. Thus. it is necessary to investigate the condition to prepare the hydrogenated rubber from ENR. In the present work. natural rubber which was deproteinized with proteolytic enzyme. was epoxidized in latex state with formic acid and hydrogen peroxide was hydrogenated in high-pressure autoclave with hydrogen gas in the presence of catalyst. The relationship between structure and properties of resulting hydrogenated NR (HNR) and epoxidized NR (HEDNR) are investigated. The hydrogenated rubber product was characterized by FTIR spectroscopy . H-MR spectroscopy, DSC and TGA. The extent of hydrogenation was dependent upon reaction time, temperature and catalyst. There is no change in amount of epoxy group content of the EDPNR after the hydrogenation. Natural rubber was also investigated for a comparative study.

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กลิ่นไกล ว. ., & คาวาฮา เ. . (2006). Hydrogenation of Epoxidized Natural Rubber. Journal of Engineering, RMUTT, 7, 64–71. Retrieved from https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242281
Research Articles


[1] Schulz DN, 'Turner SR and Golub MA. Rubb,Chem. Technol. 1982, 55, 809.
[2] Burfield DR., Lim KL, Seow PK and Loo CT.Proceeding in International Rubber Conference,Kuala Lumpur 1986, 2, 47-60.
[3] Gan SN, Subbramanian N and Yahya R. J. Appl.Polym. Sci. 1996, 59(1), 63-70.
[4] Singha NK, De PP and Sivaram S. J. Appl. Polym.Sci. 1997, 66(9), 1647-1652.
[5] Roy S, Bhattacharjee and Gupta BR. J. Appl.Polym. Sci. 1993, 49(3), 375-380.
[6] Rubber Research Institute of Malaysia. SMR Bulletin No. 17, 1973.
[7] Eng AH, Kawahara S, Tanaka Y. J. Nat. Rubb.Res. 1993, 8(2), 109.
[8] Eng AH, Kawahara S, Tanaka Y. J.Appl. Polym.Sci.Polym.Symp. 1994, 53, 5.
[9] Eng AH, Tanaka Y, Gan SN. J. Nat. Rubb. Res.1992,7,152.
[10] Roy S, Maiti BR, Gupta BR. Polym. Reac. Eng.1994, 2(3), 215.
[11] Ng SC, Gan LH. Eur.Polym. J. 1981, 17(10),1073.
[12] Eng AH, Tanaka Y, Gan SN. J. Nat. Rubb. Res.1997, 12(2), 82.
[13] Klinklai W, Kawahara S, Mizumo T, Yoshizawa M, Sakdapipanich JT, Isono Y, Ohno H. Eur.Polym. J. 2003, 39, 1707-1712.