Effect of weathering on physical and mechanical properties of hybrid nanocomposite based on polyethylene, woodflour and nanoclay

Authors

  • Amir Eshraghi
  • Habibollah Khademieslam
  • Ismaeil Ghasemi

Keywords:

Carbonyl index, Fourier transform infrared spectroscopy, modulus of elasticity, Populus deltoides, water absorption, wood plastic composites, X-Ray diffraction.

Abstract

Wood plastic composites have received increasing attention during the last decades, because of many advantages related to their use. However the durability of Wood plastic composites after ultraviolet exposure has become a concern. In this research, hybrid nanocomposites of polyethylene and woodflour with different concentrations of nanoclay were fabricated using melt compounding followed by injection molding. Specimens were exposed for 2000 h to ultraviolet radiation and moisture cycling in a laboratory weathering device to simulate the effects of exposure to sunlight and rain. Physical and mechanical properties of the nanocomposites were evaluated, before and after weathering. The results indicated that the water absorption of wood plastic composites increased after weathering but nanoclay reduced the intensity of weathering to some extent, through decreasing of water absorption. Also results showed that weathering decreased modulus of elasticity values, however good dispersion of clay layers resulted in fewer drop of modulus of elasticity values. Fourier transform infrared spectroscopy showed that lowest carbonyl index is related to the nano wood plastic composites with 2wt% nanoclay. Also X-Ray diffraction patterns revealed that intercalation morphology has been formed for nano particles.

Downloads

Download data is not yet available.

References

Adhikary, K.B.; Pang, S.; Staiger, M. 2009. Accelerated ultraviolet weathering of recycled polypropylene sawdust composites. Thermoplastic Composite Materials 22(6):661-679.

Alexandre, B.; Marais, S.; Langevin, D.; Mederic, P.; Aubry, T. 2006. Nanocomposite-based polyamide 12/montmorillonite: relationships between structures and transport properties. Desalination 199(1):164-166.

Ashori, A.; Nourbakhsh, A. 2011. Preparation and characterization of polypropylene/wood flour/ nanoclay composites, European Journal of Wood and Wood Products 69(4):663-666.

Ashori, A.; Nourbakhsh, A. 2009. Effects of nanoclay as a reinforcement filler on the physical and mechanical properties of wood based composite. Compos Mater 43(18):1869-1875.

Belgacem, M.N.; Bataille, P.; Sapieha, S. 1994. Effect of corona modification on the mechanical properties of polypropylene/cellulose composites. J Appl Polym Sci 53(4):379-385.

Candan, Z.; Akbulut, T. 2015. Physical and mechanical properties of nanoreinforced particleboard composites. Maderas-Cienc Tecnol 17(2):319-334.

Colom, X.; Carrillo, F.; Nogues, F.; Garriga, P. 2003. Structural analysis of photodegraded wood by means of FTIR spectroscopy. Polymer Degradation and Stability 80(3):543-549.

Eshraghi, A.; Khademieslam, H.; Ghasemi, I.; Talaiepoor, M. 2013. Effect of weathering on the properties of hybrid composite based on polyethylene, wood flour, and nanoclay. BioResources 8(1):201-210.

Faruk, O.; Matuana, L.M. 2008. Nanoclay reinforced HDPE as a matrix for wood-plastic composites. Composites Science and Technology 68(9):2073-2077.

Ghasemi, I.; Kord, B. 2009. Long-term water absorption behaviour of polypropylene/wood flour/ organoclay hybrid nanocomposite. Iranian Polymer Journal 18(9):683-691.

Grigoriadou, I.; Paraskevopoulos, K.M.; Chrissafis, K.; Pavlidou, E. Stamkopoulos, T.G. ; Bikiaris, D. 2011. Effect of different nanoparticles on HDPE UV stability. Polymer Degradation and Stability 96(1):151-163.

Hemmasi, A.H.; Khademi-Eslam, H.; Talaiepoor, M.; Kord, B.; Ghasemi, I. 2010. Effect of nanoclay on the mechanical and morphological properties of wood polymer nanocomposite. Reinforced Plastics and Composites 29(7):964-971.

Khonsari, A.; Taghiyari H.R.; Karimi, A.; Tajvidi, M. 2015. Study on the effects of wood flour geometry on physical and mechanical properties of wood-plastic composites. Maderas-Cienc Tecnol 17(3): 545-558.

Kord, B.; Hemmasi, A.; Ghasemi, I. 2011. Properties of PP/wood flour/organomodified montmorillonite nanocomposites. Wood Sci Technol 45(1):111-119.

Lee, H.; Kim, D.S. 2009. Preparation and physical properties of wood/polypropylene/clay nanocomposites. Applied Polymer Science 111(6):2769-2776.

Lundin, T.; Cramer, S.M.; Falk, R. H.; Felton, C. 2004. Accelerated weathering of natural fiberfilled polyethylene composites. Materials in Civil Engineering 16(6):547-555.

Pascual, J.; Fages, E.; Fenollar, O.; García, D.; Balart, R. 2009. Influence of the compatibilizer/ nanoclay ratio on final properties of polypropylene matrix modified with montmorillonite-based organoclay. Polymer Bulletin 62(3):367-380.

Roy, P. K.; Surekha, P.; Raman, R.; Rajagopal, C. 2009. Investigating the role of metal oxidation state on the degradation behaviour of LDPE. Polymer Degradation and Stability 94(7):1033-1039.

Samariha, A.; Hemmasi, A.H.; Ghasemi, I.; Bazyar, B.; Nemati, M. 2015. Effect of nanoclay contents on properties of bagasse flour/reprocessed high density polyethylene/nanoclay composites. Maderas-Cienc Tecnol 17(3):637-646.

Stark, N. 2001. Influence of moisture absorption on mechanical properties of wood flour polypropylene composites. Thermoplastic Composite Materials 14(5):421-432.

Stark, N. 2006. Effect of weathering cycle and manufacturing method on performance of wood flour and high density polyethylene composites. Applied Polymer Science 100(4):3131-3140.

Stark, N.; Matuana, L. M. 2004. Surface chemistry changes of weathered HDPE/ wood flour composites studied by XPS and FTIR spectroscopy. Polym Degrad Stab 86(1):1-9.

Stark, N. ; Matuana, L.M.; Clemons, C.M. 2003. Effect of processing method on accelerated weathering of wood flour-HDPE composites,” Proceedings of the 7th International Conference on Woodfiber-Plastic Composites, 79-87.

Vazquez, M.R.; Liauw, C.M.; Allen, N.S.; Edge, M.; Fontan, E. 2006. Degradation and stabilisation of poly(ethylene-stat-vinyl acetate): 1 - Spectroscopic and rheological examination of thermal and thermo-oxidative degradation mechanisms. Polymer Degradation and Stability 91(1):154-164.

Downloads

How to Cite

Eshraghi, A., Khademieslam, H., & Ghasemi, I. (2016). Effect of weathering on physical and mechanical properties of hybrid nanocomposite based on polyethylene, woodflour and nanoclay. Maderas-Cienc Tecnol, 18(4), 617–626. Retrieved from https://revistas.ubiobio.cl/index.php/MCT/article/view/2559

Issue

Section

Article

Most read articles by the same author(s)