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Modifikasi Kimia ke atas Getah Asli Cecair dengan Kaedah Penghidroklorinan (Chemical Modification of Liquid Natural Rubber Via Hydrochlorination)

Rusli Daik, and Mohd Norhisham Satiar, and Ibrahim Abdullah, (2002) Modifikasi Kimia ke atas Getah Asli Cecair dengan Kaedah Penghidroklorinan (Chemical Modification of Liquid Natural Rubber Via Hydrochlorination). Sains Malaysiana , 31 . pp. 57-63. ISSN 01266039

Full text not available from this repository.

Official URL: http://pkukmweb.ukm.my/~jsm/english_journals/vol31_2002/vol31_02page57-63.html

Affiliations

Universiti Kebangsaan Malaysia, Faculty of Science andTechnology. School of Chemical Sciences and Food Technology
Universiti Kebangsaan Malaysia, Faculty of Science andTechnology. School of Chemical Sciences and Food Technology
Universiti Kebangsaan Malaysia, Faculty of Science andTechnology. School of Chemical Sciences and Food Technology

Abstract

Chemical modification of liquid matural rubber was carried out via hydrochlorination reaction. Hydrogen chloride that was produced from the reaction between ammonium chloride and concentrated sulphuric acid was bubbled into liquid natural rubber solution in benzene. The product was a soft solid in dark brown colour. The presence of chlorine in the samples produced was detected using elemental analysis and FTIR spectroscopy. The peak at 736 cm-1 in the FTIR spectrum of the hydroclorinated samples indicated the presence of C-C1 vibration. Thermogravimetry analysis showed that the hyrdrochlorinated product was less stable against heat as compared to the orginal samples. Samples of hydrochlorinated liquid natural rubber with degree of hydrochlorination of 35 and 62% were successfully prepared as calculated based on results obtained from elemental analysis, determina­tion of iodine number, FTIR spectroscopy and thermogravimetric analysis.

Modifikasi kimia ke atas getah asli cecair telah dijalankan melalui tindak balas penghidroklorinan dalam pelarut benzena dengan melalukan gas hidrogen klorida yang dihasilkan daripada tindak balas antara asid sulfurik pekat dan ammonium klorida. Hasil tindak balas merupakan pepejal lembut berwarna perang pekat. Kehadiran klorin dalam sampel telah ditentukan menggunakan analisis unsur dan spektroskopi FTIR. Puncak pada 736 cm-1 dalam spektrum FTIR bagi sampel getah asli cecair terhidroklorin menunjukkan wujudnya ikatan C-CI. Analisis termogravimetri menunjukkan getah asli cecair terhidroklorin kurang stabil terhadap haba berbanding dengan getah asli cecair yang asal. Berdasarkan analisis unsur, penentuan nombor iodin, spektroskopi FTIR dan analisis termogravimetri, sampel dengan darjah penghidroklorinan sebesar 35 dan 62 % telah berjaya dihasilkan.

Item Type:Journal
Keywords:Natural rubber
Subjects:Q Science, Computer Science
ID Code:2988

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Bunn, C.W. & Garner, E.V. 1942. The Crystal Structure of Rubber Hydrochloride. London. 654-658.

Crarnpsey, E., Gordon, M., & Taylor, J.S. 1953. Kinetics and Mechanism of Hyrdrochlorination of Synthetic and Natural Polyisoprene Latex. London. 39:25­3-93l.

Golub, M.A. & Heller, U. 1964. Remarks on The Hydrochlorination of 1, 4­-polyisoprene. Journal of Polymer Science (B2): 723-733.

Ibrahim Abdullah & Sahrim Ahmad. 1992. Liquid Natural Rubber as a Compatibilizer in the Blending of Natural Rubber with Polypropylene. Material Forum 16: 353-­357.

Ibrahim Abdullah & Zuriati Zakaria. 1989. Pendepolimeran Fotokimia Getah Asli. Sains Malaysiana 18(2): 99-109.

Sahrim Ahmad, Ibrahim Abdullah & Che Som Sulaiman. 1995. Blending of Natural Rubber with Linear Low-Density Polyethylene. Journal of Applied Polymer Science 58: 1125-1133.

Seow, P.K. & See. T.M.S. 1977. Chemical Modification On Natural Rubber. Proc. Symp. Improving The Quality of Life in Malaysia. The Role of Chemistry 229-246.

Xanthos, M. & Dali, S.S. 1991. Compatibilization of Polymer Blends by Reactive Processing. Journal of Polymer Engineering Science 31(5): 929-935.

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