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The Influence of Temperature and Reaction Time in the Degradation of Natural Rubber Latex.

Siti Zaleha Isa, and Rosiyah Yahya, and Aziz Hassan, and Tahir M., (2007) The Influence of Temperature and Reaction Time in the Degradation of Natural Rubber Latex. Malaysian Journal of Analytical Sciences, 11 (1). pp. 42-47. ISSN 13942506

Full text not available from this repository.

Official URL: http://pkukmweb.ukm.my/~mjas/v11_n1/07_MJAS%20125C3%20final_20_.pdf

Affiliations

University of Malaya, Faculty of Science, Dept. of Chemistry

Abstract

Liquid natural rubber (LNR /LENR) should be considered as a new material instead of a new type of rubber though they have the same configuration as the rubber used. In this work, thermal degradation of natural rubber latex was carried out to obtain LNR/LENR by varying the reaction time at different temperatures. The degraded polymers were characterized structurally using FTIR and NMR spectroscopies and the average molecular weights were determined by membraneosmometryand viscometry.

Getah asli cecair (LNR/LENR) harus dianggap sebagai suatu bahan baru dan bukan jenis getah baru walaupun mempunyai konfigurasi yang sama seperti getah asli yang digunakan. Dalam kajian ini, degradasi terma terhadap getah asli latek dijalankan untuk memperolehi LNR/LENR dengan masa tindak balas dan suhu yang berbeza. Pengkelasan struktur bagi polimer degradasi diperolehi dengan menggunakan kaedah spektrometer FTIR dan NMR manakala berat purata molekul ditentukan oleh osmometer membran dan viskometer.

Item Type:Journal
Additional Information:The authors would like to thank the Malaysian Government, University of Malaya for fundamental grant and IRPA grant.
Keywords:Natural rubber latex, chain-scission, degradation, chemistry
Subjects:Q Science
ID Code:1001

1. Gelling, I.R. (1981). Epoxidation Natural Rubber. Brit. Pat. No. 2113692

2. Gelling, I.R. (1984) Modification of natural rubber latex with peracetic acid, Rubb. Chem. & Tech. J., 58(1),86.-96.

3. Tangpakdee. J. and Tanaka. T. (1997), Purification of natural rubber, J. Nat. Rubb.Res., 12(2), 112-119.

4. P. Phinyocheep, C.W. Phetphaisit, D. Derouet, I. Champistron, J. C. Brosse (2005), Chemical Degradation of epoxidized natural rubber using periodic acid, J. Appl. Polm. Sci, 95, 6-15.

5. Ravindran, T.,Gopinathan Nayar, M.R.and Francis, D.J. (1988). Production of hydroxyl-terminated liquid natural

rubber - mechanism of photochemical depolymerization and hydroxylation, J. Appl. Polm. Sci., 35, 227-1239.

6. Jitladda Tangpakdee Sakdapipanich, Tippawan Kowitteerawut, Seiichi Kawahara & Yasuyuki Tanaka, (2001). Depolymerisation of highly purified natural rubber. 1. Metal catalysed oxidation of deproteinised natural rubber, J. Rubb. Res., 4(1), 1-10.

7. Solanky, S.S. Singh, R.P., Reyx, D. & Campistron, I. (2000). Photo-controlled degradation of natural rubber, J.

Rubber. Res, 3(2), 76-94.

8. George V. Thomas and Gopinathan Nair, M.R.(1996). Viscosity behavior of PVC Modified Liquid natural rubber blends. J.Appl.Sci., 62, 2229-2236.

9. George V. Thomas and Gopinathan Nair, M.R. (1998). Ultrasonic investigation on compatibility of PVC-modified liquid natural rubber blends, J. Appl. Polm. Sci., 69,785-790.

10. Gan, S.N. and Z.A. Hamid. (1997). Partial conversion of epoxide groups to diols in epoxided natural rubber, Poly, 38(8), 1953-1956.

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