Effect of nanoclay particles content on the mechanical properties of wood flour-polypropylene composites using dynamic mechanic thermal analysis

Document Type : Research Paper

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Abstract

In this study, the effect of nanoclay particles content on the mechanical properties of wood flour-polypropylene composites was investigated using Dynamic Mechanic Thermal Analysis (DMTA). To meet this objective, wood flour was mixed with polypropylene at 60 % by weight fiber loading. The concentration was varied as 0, 3 and 5 per hundred compounds (phc) for nanoclay. The amount of coupling agent (PP-g-MA) was fixed at 2 phc for all formulations. The samples were made by melt compounding and injection molding. Static mechanical tests including bending and tensile were performed. DMTA test in the range of -60 to 120 0C with 5 0C/min temperature rate and 1 Hz frequency was done. The morphology of the nanocomposites has been examined by using x-ray diffraction and transmission electron microscopy. Results indicated that the mechanical strength and storage modulus of samples increases with increase of nanoclay up to 3 phc and then decreases with 5 phc nanoclay addition. Also, the alpha and beta transition in samples transmitted to higher temperatures with addition of nanoclay. The morphological studies with XRD and TEM revealed that nanoclay distributed as intercalation structure in polymer matrix.

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References

[1]      Agarwal, B.D., and Broutman, L.J., 1980. Analysis and performance of fiber composites, John Willy & Sons, Inc, USA, 342p.
[2]      Wolcott, MP., 1993. Wood fiber polymer composites; Fundamental concept processes and material options, Forest Product Society, USA, 68p.
[3]      Felix, R., 1993. Handbook of polymer- fiber composites, Longman Group, UK, 418p.
[4]      Woodhams, R.T., Thomas, G., and Rodgers, D.K. 1984. Wood fibers as reinforcing fillers for polyoefins. Journal of Polymer Engineering Science, 24: 1166–1171.
[5]      Rowell, R.M., Sandi, A.R., Gatenholm, D.F., and Jacobson, R.E., 1997. Utilization of natural fibers in plastic composites: Problem and opportunities in lignocellulosic composites. Journal of Composite, 18: 23-51.
[6]      Oksman, K., and Sain, M., 2008. Wood-Polymer Composites, Woodhead Publishing Ltd, Great Abington, Cambridge, UK, 366p.
[7]      Tjong, S.C., 2006. Structural and mechanical properties of polymer nanocomposites; A review. Journal of Material Science Engineering, 53: 73-197.
[8]      Utracki, L.A., Sepehr, M., and Boccaleri, E., 2007. Synthetic layered nanoparticles for polymeric nanocomposites (PNCs); A review. Journal of Polymer Additives Technology, 8: 1-37.
[9]      Viswanathan, V., Laha, T., Balani, K., Agarwal, A. and Seal, S., 2006. Challenges and advances in nanocomposite processing techniques; A review. Journal of Material Science Engineering, 54: 121-285.
[10]  Alexandre, M., and Dubois, P., 2008. Polymer-layered silicate nanocomposites: preparation, properties and use of a new class of materials; A review. Journal of Material Science Engineering, 28: 1-63.
[11]  Wang, L., Wang, K., Chen, L., Zhang, Y., and He, C., 2005. Preperation, morphology and thermal/mechanical properties of epoxy/nanoclay composite. Journal Applied Polymer Science, (103), 1681-1689.
[12]  Wu, Q., Lei, Y., Clemons, C.M., Yao, F., Xu, Y., and Lian, K., 2007. Properties of HDPE/Clay/Wood Nanocomposites. Journal of Plastic Technology, 27(2): 108-115.
[13]  Kord, B., 2009. Investigation on the physical, mechanical and morphological properties of wood flour/polypropylene/nanofiller hybrid composite, PhD Thesis, Science and Research Branch, Islamic Azad University. (In Persian)
[14]  Tajvidi, M., 2003. Investigation on engineering and viscoelastic properties of thermoplastic-natural fiber composites using dynamic mechanical analysis, PhD Thesis, Tehran University. (In Persian)
[15]  Oksman, K., Lindberg, H., and Holmergen, A., 1998. The nature and location of SEBS-MA compatibilizer inpolyethylene-wood flour composites. Journal of Applied Polymer Science, 69, 201-209.
[16]  Sandi, A.R., and Caulfield, D.F., 2009. Transcrystalline interphases in natural fiber-PP composites: effect of coupling agent. Composite Interfaces, 7(1), 31-43.
[17]  Tajvidi, M., Ebrahimi, G.H., and Enayati, A.A., 2003. Dynamic mechanical analysis of compatibilizer effect on mechanical properties of wood flour-polypropylene composites.Iranian Journal of Natural Resources, 47-59. (In Persian)
[18]  Yin, S., Rials, T.G., and Wolcott, M.P., 1999. Crystallization behavior of polypropylene and its effect on wood fiber plastic composites, Proceeding of 5th International Conference on wood fiber plastic composites, Forest Product Society & Laboratory, Madison, 139-146.
[19]  ASTM D E1640., 2013. Standard test method for assignment of the glass transition temperature by dynamic mechanical analysis, American Society of Testing and Materials.
[20]  Lei, Y., Wu, Q., Clemons, C.M., Yao, F. and Xu, Y., 2007. Influence of nanoclay on properties of HDPE/wood composites. Journal of Applied Polymer Science, 18: 1425-1433.
[21]  Zhao, Y., Wang, K., Zhu, F., Xue, P., and Jia, M., 2006. Properties of poly (vinylchloride)/ woodflour/montmorillonite composites: effects of coupling agents and layered silicate. Journal of Polymer Degradation Stability, 91: 2874-2883.
[22]  Hemmasi, A., Khademieslam, H., Talaiepoor, M., Kord, B., and Ghasemi, I., 2010. Effect of nanoclay on the mechanical and morphological properties of wood polymer nanocomposite. Journal of Reinforced Plastic and Composites, 29(7): 964-971.
[23]  Hetzer, M., and Kee, D., 2008. Wood/polymer/nanoclay composites, environmentally friendly sustainable technology; a review. Journal of Chemical Engineering, 16: 1016-1027.
[24]  Han, G., Lei, Y., Wu, Q., Kojima, Y., and Suzuki, S., 2008. Bamboo–fiber filled high density polyethylene composites; Effect of coupling treatment and nanoclay. Journal of Polymer Environment, 21: 1567-1582.
[25]  Kord, B., Hemmasi, A., and Ghasemi, I., 2011. Properties of PP/wood flour/ organomodified montmorillonite nanocomposite. Wood Science and Technology, 45: 111-119.
[26]  Kodgire, P., Kalgaonkar, R., Hambir, S., Bulakh, N., and Jog, J.P., 2001. PP/clay nanocomposites: Effect of clay treatment on morphology and dynamic mechanical properties. Journal of Applied Polymer Science, 81(7): 1786-1794.
[27]  Mohanty, S., and Nayak, S.K., 2007. Effect of clay exfoliation and organic modification on morphological, dynamic mechanical and thermal behavior of melt compounding polyamide-6 nanocomposites. Journal of Polymer Composite, 153-162.
[28]  Kord, B., 2011.  Nanofiller reinforcement effects on the thermal, dynamic mechanical and morphological behavior of HDPE/rice husk flour composites. BioResources, 6(2): 1351-1358.
[29]  Venkatesh, G.S. Deb, A., Ajay Karmarkar, A., and Chauhan, S. 2012. Effect of nanoclay content and compatibilizer on viscoelastic properties of montmorillonite/polypropylene nanocomposites. Materials and Design, 37: 285–291.
[30]  Pirani, S.I., Krishnamachari, P., and Hashaikeh, R., 2014. Optimum loading level of nanoclay in PLA nanocomposites: Impact on the mechanical properties and glass transition temperature. Journal of Thermoplastic Composite Materials, DOI: 10.1177/0892705712473627, In Press.
Iranian Journal of Wood and Paper Industries
Volume 5, Issue 2 - Serial Number 2
November 2014
Pages 15-26

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