Prediction and optimization of mechanical properties of PA6/NBR/graphene nanocomposites fabricated by friction stir processing

Abstract

The friction stir process (FSP) method used to prepare polyamide 6 (PA6)/nitrile-butadiene rubber (NBR) nanocomposites with 1 wt% Graphene nanoparticles. Response surface methodology (RSM) and Box-Behnken design were used to study the effects of four input variables including tool rotational speed (ω), shoulder temperature (T), traverse speed (S), and the number of passes (N) on tensile strength and impact strength of PA6/NBR/Graphene nanocomposite. In order to investigate the dispersion state of Graphene and the morphology of the PA6/NBR blend in the presence of Graphene, wide x-ray patterns (WAX), scanning electron microscopy (SEM) were performed. Furthermore and differential scanning calorimetric (DSC) was used to investigate the thermal properties of PA6/NBR containing 1 wt% Graphene nanoparticles. The results confirmed that at the optimum range of input variables, PA6/NBR/Graphene nanocomposite provided good thermal stability as well as the highest tensile strength, and impact strength. This is caused by the large surface area to volume ratio of the dispersed layered Graphene in PA6/NBR blends. Under optimal conditions of the rotational speed of 1200 rpm, traverse speed of 20 mm/min, shoulder temperature of 125°C, and number pass of 3, the maximum tensile strength and impact strength are 70.4 MPa and 70.3 J/m, respectively.

Keywords

PA6/NBR/graphene nanocomposite friction stir process mechanical properties morphology

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References

Arefazar

Shokoohi

. Polymer blends and alloys. Vol. 310–324. Tehran, Iran: Amirkabir University of Technology Publications, 2010, pp. 237–239.

Garg

Visht

Sharma

, et al. Formulation, characterization and application on nanoparticle: a review. Der Pharm Sin 2011; 2(2):17–26.

Akbari

Tavandashti

Zandrahimi

. Particle size characterization of nanoparticles—a practical approach. Iran J Mater Sci Eng 2011; 8(2): 48–56.

Mahallati

Arefazar

Naderi

. Thermal and morphological properties of thermoplastic elastomer nanocomposites based on PA6/NBR. Iran J Chem Eng 2011; 8(1): 56–65.

Paran

Naderi

Ghoreishy

, et al. Essential work of fracture and failure mechanisms in dynamically vulcanized thermoplastic elastomer nanocomposites based on PA6/NBR/XNBR-grafted HNTs. Eng Fract Mech 2018; 200: 251–262.

Nakhaei

Mohammadi

Naderi

, et al. Experimental study of microstructure, thermal and mechanical properties of PA6/NBR nanocomposites reinforced with graphene nanoparticle. J Sci Technol Compos 2019; 6(3): 419–426.

Mehrabzadeh

Delfan

. Thermoplastic elastomers of butadiene-acrylonitrile copolymer and polyamide. Vi. dynamic crosslinking by different systems. J Appl Polym Sci 2000; 77(9): 2057–2066.

Fagundes

Jacobi

MA.

PA/NBR TPVs: crosslink system and properties. Polímeros 2012; 22(2): 206–212.

Johns

. Friction stir welding of polymeric materials. BrighamYoung University: Brigham Young University Press, 1999.

10.

Sperling

. Physical Polymer Science. New York; Wiley, 2001.

11.

Schmidt

Hattel

Wert

. An analytical model for the heat generation in friction stir welding. Model Simul Mater Sic Eng 2004; 12(1): 143–157.

12.

Nakhaei

Naderi

Mostafapour

. Effect of processing parameters on morphology and tensile properties of PP/EPDM/organoclay nanocomposites fabricated by friction stir processing. Iran Polym J 2016; 25(2): 179–191.

13.

Valentini

Bon

Lopez-Manchado

, et al. Synergistic effect of graphene nanoplatelets and carbon black in multifunctional EPDM nanocomposites. Compos Sci Technol 2016; 1: 123–130.

14.

Sabzi

Jiang

Liu

, et al. Graphene nanoplatelets as poly (lactic acid) modifier: linear rheological behavior and electrical conductivity. J Mater Chem A 2013; 1(28): 8253–8261.

15.

El Achaby

Arrakhiz

Vaudreuil

, et al. Mechanical, thermal, and rheological properties of graphenebased polypropylene nanocomposites prepared by melt mixing. Polym. Compos 2012; 33(5): 733–744.

16.

Zinati

Razfar

. Finite element simulation and experimental investigation of friction stir processing of Polyamide 6. J Eng Manuf 2015; 229(12): 2205–2215.

17.

Barmouz

Seyfi

Givi

MKB

, et al. A novel approach for producing polymer nanocomposites by in-situ dispersion of clay particles via friction stir processing. Mater Sci Eng 2011; 528(6): 3003–3006.

18.

Naderi

Lafleur

Dubois

. Microstructure-properties correlations in dynamically vulcanized nano-composite thermoplastic elastomers based on PP/EPDM. Polym Eng Sci 2007; 47 (3): 207–217.

19.

Chiu

Yen

Chen

. Phase morphology and physical properties of PP/HDPE/organoclay (nano) composites with and without a maleated EPDM as a compatibilizer. Polym Test 2010; 29(6): 706–716.