Tensile and Morphological Properties of Microcellular Polymeric Nanocomposite Foams Reinforced with Multi-walled Carbon Nanotubes


1 Mechanical Engineering Department, Urmia University, Urmia, Iran

2 Young Researchers and Elite Club, Urmia Branch, Islamic Azad University, Urmia, Iran


Polyamide 6 (PA6) is used in many applications due to its advantages and improving its properties seems essential. For this purpose in the present study, PA6 was melt compounded with various multi-walled carbon nanotubes (MWCNTs) contents and then was foamed using Azodi carbon amide (ACA) as blowing agent under different injection molding conditions. Morphological properties were investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM) tests. The results demonstrated that an appropriate distribution of MWCNTs was observed in polymeric matrix and 0.85, 0.94 and 1 Å increase in distance between walls of CNTs was observed. Also, the SEM results illustrated that microcellular structure was achieved in all samples. The results illuminated that mean cell size was improved about 34% in samples containing 1 wt% MWCNT. The tensile properties of samples were investigated and the effect of MWCNTs content was studied on specific tensile and yield strengths. The results indicated that specific tensile strength and yield strength were significantly increased almost 164% and 147% by addition of 1 wt% of MWCNTs, respectively.


1.     Junian, S.S., Sahari, J., Makmud, M.Z.H., Arief, Y.Z. and Wahit, M.U., "Tensile and physical properties of linear low density polyethylene-natural rubber composite: Comparison between size and filler types", International Journal of Engieneeering, TRANSACTIONS C: Aspects,  Vol. 29, No. 9, (2016), 1257-1262.
2.     Hasanzadeh, R., Azdast, T., Eungkee Lee, R. and Afsari Ghazi, A., "Experimental polymeric nanocomposite material selection for automotive bumper beam using multi-criteria decision making methods", Iranian Journal of Materials Science and Engineering,  Vol. 14, No. 3, (2017), 1-10.
3.     Eungkee Lee, R., Hasanzadeh, R. and Azdast, T., "A multi-criteria decision analysis on injection moulding of polymeric microcellular nanocomposite foams containing multi-walled carbon nanotubes", Plastics, Rubber and Composites,  Vol. 46, No. 4, (2017), 155-162.
4.     Almajid, A., Sorochynska, L., Friedrich, K. and Wetzel, B., "Effects of graphene and cnt on mechanical, thermal, electrical and corrosion properties of vinylester based nanocomposites", Plastics, Rubber and Composites,  Vol. 44, No. 2, (2015), 50-62.
5.     Dey, A., Bajpai, O.P., Sikder, A.K., Chattopadhyay, S. and Khan, M.A.S., "Recent advances in cnt/graphene based thermoelectric polymer nanocomposite: A proficient move towards waste energy harvesting", Renewable and Sustainable Energy Reviews,  Vol. 53, No., (2016), 653-671.
6.     Hasanzadeh, R., Azdast, T., Doniavi, A., Babazadeh, S., Lee, R., Daryadel, M. and Shishavan, S., "Welding properties of polymeric nanocomposite parts containing alumina nanoparticles in friction stir welding process", International Journal of Engineering-Transactions A: Basics,  Vol. 30, No. 1, (2017), 143.
7.     Doniavi, A., Babazadeh, S., Azdast, T. and Hasanzadeh, R., "An investigation on the mechanical properties of friction stir welded polycarbonate/aluminium oxide nanocomposite sheets", Journal of Elastomers & Plastics,  Vol. 49, No. 6, (2017), 498-512.
8.     ESMAILI, P., AZDAST, T., DONIAVI, A., HASANZADEH, R., MAMAGHANI, S. and LEE, R.E., "Experimental investigation of mechanical properties of injected polymeric nanocomposites containing multi-walled carbon nanotubes according to design of experiments",  Vol., No., (2015).
9.     Liu, T., Phang, I.Y., Shen, L., Chow, S.Y. and Zhang, W.-D., "Morphology and mechanical properties of multiwalled carbon nanotubes reinforced nylon-6 composites", Macromolecules,  Vol. 37, No. 19, (2004), 7214-7222.
10.   Yuan, M., Turng, L.S., Gong, S., Caulfield, D., Hunt, C. and Spindler, R., "Study of injection molded microcellular polyamide‐6 nanocomposites", Polymer Engineering & Science,  Vol. 44, No. 4, (2004), 673-686.
11.   Rashahmadi, S., Hasanzadeh, R. and Mosalman, S., "Improving the mechanical properties of poly methyl methacrylate nanocomposites for dentistry applications reinforced with different nanoparticles", Polymer-Plastics Technology and Engineering,  Vol. 56, No. 16, (2017), 1730-1740.
12.   Michaeli, W., Flórez, L., Obeloer, D. and Brinkmann, M., "Improving the impact behaviour of structural foams", Cellular Polymers,  Vol. 28, No. 4, (2009), 269.
13.   Shimbo, M., Higashitani, I. and Miyano, Y., "Mechanism of strength improvement of foamed plastics having fine cell", Journal of Cellular Plastics,  Vol. 43, No. 2, (2007), 157-167.
14.   Modanloo, V., Hasanzadeh, R. and Esmaili, P., "The study of deep drawing of brass-steel laminated sheet composite using taguchi method", International Journal of Engineering (IJE), Transactions A: Basics,  Vol. 29, No. 1, (2016), 103-108.
15.   Dixit, A. and Kumar, K., "Optimization of mechanical properties of silica gel reinforced aluminium mmc by using taguchi method", Materials Today: Proceedings,  Vol. 2, No. 4-5, (2015), 2359-2366.
16.   Nam, T.H., Goto, K., Yamaguchi, Y., Premalal, E., Shimamura, Y., Inoue, Y., Arikawa, S., Yoneyama, S. and Ogihara, S., "Improving mechanical properties of high volume fraction aligned multi-walled carbon nanotube/epoxy composites by stretching and pressing", Composites Part B: Engineering,  Vol. 85, No., (2016), 15-23.
17.   Guo, J., Liu, Y., Prada‐Silvy, R., Tan, Y., Azad, S., Krause, B., Pötschke, P. and Grady, B.P., "Aspect ratio effects of multi‐walled carbon nanotubes on electrical, mechanical, and thermal properties of polycarbonate/mwcnt composites", Journal of Polymer Science Part B: Polymer Physics,  Vol. 52, No. 1, (2014), 73-83.
18.   Iqbal, Q., Bernstein, P., Zhu, Y., Rahamim, J., Cebe, P. and Staii, C., "Quantitative analysis of mechanical and electrostatic properties of poly (lactic) acid fibers and poly (lactic) acid—carbon nanotube composites using atomic force microscopy", Nanotechnology,  Vol. 26, No. 10, (2015), 105702.