Malaysian Journal of Analytical Sciences Vol 22 No 5 (2018): 899 - 905

THERMAL, FLAMMABILITY, AND MORPHOLOGICAL PROPERTIES OF SEPIOLITE-FILLED ETHYLENE PROPYLENE DIENE MONOMER COMPOSITES

(Sifat Terma, Kemudahbakaran dan Morfologi bagi Komposit Etilena Propilena Monomer Diena Terisi Sepiolit)

Nurul Aizan Mohd Zaini, Hanafi Ismail*, Arjulizan Rusli

School of Materials and Mineral Resources Engineering, Engineering Campus,

Universiti Sains Malaysia,14300 Nibong Tebal, Pulau Pinang, Malaysia

*Corresponding author: ihanafi@usm.my

Received: 20 July 2017; Accepted: 28 April 2018

Abstract

The effects of different sepiolite contents on the thermal stability, flammability, and morphological properties of sepiolite-filled ethylene-propylene-diene monomer composites were studied. These sepiolite-filled composites, containing 0-70 parts per hundred rubber (phr) of sepiolite fillers, were prepared through the conventional processing method of using a two-roll mill. The results demonstrated a significant increase in the thermal stability of the composites when sepiolite loading was increased compared to unfilled composites. The results also showed a decrease in the linear rate of burning of the composites with increasing sepiolite loading. The morphological study confirmed the presence of unburned sepiolite, which increased the flammability resistance of the composites.

Keywords: sepiolite, flammability, rubber, thermal stability, morphology

Abstrak

Kesan kandungan sepiolit yang berbeza terhadap kestabilan terma, kemudahbakaran, dan ciri-ciri morfologi bagi komposit etilena-propilena-monomer diena terisi sepiolit telah dikaji. Komposit terisi sepiolit yang mengandungi 0 hingga 70 bahagian per seratus getah (bsg) telah disediakan melalui kaedah lazim menggunakan mesin pengisar bergulung dua. Keputusan menunjukkan peningkatan ketara pada kestabilan terma komposit apabila kandungan sepiolit ditambah berbanding dengan komposit tidak terisi. Hasil kajian turut menunjukkan penurunan kadar pembakaran selari komposit ini dengan penambahan kandungan sepiolit. Kajian morfologi mengesahkan kehadiran sepiolit yang tidak terbakar yang telah meningkatkan ketahanan kemudahbakaran komposit ini.

Kata kunci: sepiolit, kemudahbakaran, getah, kestabilan terma, morfologi

References

1. Velde, B. (1992). Introduction to clay minerals- chemistry, origin, uses and environmental significance. First edition. Chapman and Hall, London.

2. Pavlidou, S. and Papaspyrides, C.D., (2008). A review on polymer-layered silicate nanocomposites. Progress in Polymer Science, 33(11): 1119-1198.

3. Nguyen, Q. T. and Baird, D. G. (2006). Preparation of polymer–clay nanocomposites and their properties. Advances in Polymer Technology, 25(4): 270-285.

4. Zaini, N. A. M., Ismail, H. and Rusli, A. (2017). Short review on sepiolite filled polymer nanocomposites. Polymer- Plastics Technology and Engineering, 56(15): 1665-1679.

5. Olivato, J. B., Marini, J. and Yamashita, F. (2017). Sepiolite as a promising nanoclay for nano-biocomposites based on starch and biodegradable polyester. Materials Science and Engineering C, 70: 296-302.

6. Zotti, A., Borriello, A. and Ricciardi, M., (2015). Effects of sepiolite clay on degradation and fire behaviour of a bisphenol A-based epoxy. Composites Part B Engineering, 73: 139-148.

7. Tartaglione, G., Tabuani, D., Camino, G. and Moisio, M. (2008). PP and PBT composites filled with sepiolite: Morphology and thermal behaviour. Composites Science and Technology, 68(2) :451-460.

8. Kotal, M and Bhowmick, A. K. (2015). Polymer nanocomposites from modified clays: Recent advances and challenges. Progress in Polymer Science, 51: 127-187.

9. Chen, H., Lu, H. and Zhou, Y., (2012). Study on thermal properties of polyurethane nanocomposites based on organo-sepiolite. Polymer Degradation and Stability, 97(3): 242-247.

10. Liu, M., Pu, M. and Ma, H. (2012). Preparation, structure and thermal properties of polylactide/sepiolite nanocomposites with and without organic modifiers. Composites Science and Technology, 72(13): 1508-1514.

11. Darder, M., Matos, C. R. S. and Aranda, P., (2016). Bionanocomposite foams based on the assembly of starch and alginate with sepiolite fibrous clay. Carbohydrate Polymers, 157: 1933-1939.

12. Lowe, D. J., Chapman, A. V., Cook, S. and Busfield, J. J. C. (2011). Natural rubber nanocomposites by in situ modification of clay. Macromolecular Materials and Engineering, 296(8): 693-702.

13. Bhattacharya, M. and Bhowmick, A.K. (2010). Synergy in carbon black-filled natural rubber nanocomposites. Part I: Mechanical, dynamic mechanical properties, and morphology. Journal of Materials Science, 45(22): 6126-6138.

14. Takei, T., Oda, R. and Miura, A. (2013). Effect of dispersion of sepiolite in sepiolite-NBR composite on the tensile strength. Composites Part B Engineering, 44(1): 260-265.

15. Bhattacharya, M., Maiti, M. and Bhowmick, A. K. (2009). Tailoring properties of styrene butadiene rubber nanocomposite by various nanofillers and their dispersion. Polymer Engineering and Science, 49(1): 81-98.

16. Bokobza, L., Leroy, E. and Lalanne, V. (2009). Effect of filling mixtures of sepiolite and a surface modified fumed silica on the mechanical and swelling behavior of a styrene-butadiene rubber. European Polymer Journal, 45(4): 996-1001.

17. Roy, N. and Bhowmick, A. K. (2010). Novel in situ polydimethylsiloxane-sepiolite nanocomposites: Structure-property relationship. Polymer, 51(22):5172-5185.

18. Basurto, F. C., García-López, D. and Villarreal-Bastardo, N. (2012). Nanocomposites of ABS and sepiolite: Study of different clay modification processes. Composites Part B Engineering, 43(5): 2222-2229.

19. Tabatabaei-Yazdi Z. and Mehdipour-Ataei S. (2015). Poly(ether-imide) and related sepiolite nanocomposites: investigation of physical, thermal, and mechanical properties. Polymer for Advanced Technologies, 26(4): 308-314.

20. Bilotti, E., Duquesne, E. and Deng, H. (2014). In situ polymerised polyamide 6/sepiolite nanocomposites: Effect of different interphases. European Polymer Journal, 56(1): 131–139.

21. Wang, F, Tang, Q.G. and Chen, C. (2013). Effect of Sepiolite Nanofibers on Properties of EPDM Nanocomposites. Applied Mechanics and Materials, 320: 595–598.

22. America Society for Testing and Materials (2010). Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in Horizontal Position. ASTM D635-10.

23. Bidsorkhi, H. C., Adelnia, H. and Naderi, N. (2015). Ethylene vinyl acetate copolymer nanocomposites based on (un)modified sepiolite: Flame retardancy, thermal, and mechanical properties. Polymer Composites, 38(7): 1302-1310.

24. Chen, H., Zheng, M., Sun, H. and Jia, Q. (2007). Characterization and properties of sepiolite/polyurethane nanocomposites. Materials Science Engineering:A, 445–446 (25): 725-730.

25. Munusamy, Y., Ismail, H., Mariatti, M. and Ratnam, C. T. (2009). Effects of different preparation methods on the properties of poly[ethylene-co-(vinyl acetate)]/(Standard Malaysian natural rubber)/organoclay nanocomposites. Journal of Vinyl Additive and Technology, 15: 244-251.