Flexural and Creep Performances of Wood Fiber Reinforced Polymer Composite

Abstract:

In order to optimize the size of wood fiber reinforced polymer, and extend the application field of wood fiber reinforced polymer composites and improve the safety of their use, four size of wood fiber reinforced high-density polyethylene (HDPE) composites were prepared by forming mat-compression molding. The four kinds of fibers of different size include 80-120 mesh, 40-80 mesh, 20-40 mesh and 10-20 mesh fibers. The flexural performance, impact resistance performance and 24 hours creep - 24 hours recovery of the composites are studied. Fiber of 20-40 mesh presents the best flexural and impact resistance performance. The flexural strength, the elastic modulus and the impact strength reach 26.71MPa, 2.73Gpa and 6.88 KJ/m² respectively. The impact performance of wood fiber/HDPE composites do not change a lot, while the fiber size increases from 10 to 80 mesh. However, the composites containing 80-120 mesh fibers has minimum impact performance. The creep performance of the wood fiber/HDPE composites with 80-120 mesh is the worst. After 24h creep test, the strain of the other three groups is almost the same. Creep recovery of the composites reinforced with 40-80 mesh fiber is the worst (61.74%). The creep recovery of the other three is above seven percent. Therefore, excessively large or small fiber size proves to be negative to improve the mechanical and creep performance, and polymer composites reinforced by them are not suitable for work under long-term load.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 91-95
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.91
• Online since: March 2016
• Authors: Yan Cao, Wei Hong Wang*, Hai Long Xu, Qing Wen Wang
• Keywords: Composite, Creep Performance, Flexral Performance, Polymer, Wood Fiber

References

[1] Q.W. Wang W.H. Wang, Wood plastic composite materials and products, Chemical industry press, Beijing, (2007).

[2] R. F. Gibson, Principles of composite material mechanics, CRC Press, New York, (2007).

[3] Y. Cao, W.H. Wang, Q.W. Wang, Application of mechanical model for natural fibre reinforced polymer composites, Mater. Res. Innov. 18 (2014) 354-357.

DOI: 10.1179/1432891714z.000000000431

[4] M. Poletto, A.J. Zattera, M.M.C. Forte, Thermal decomposition of wood: Influence of wood components and cellulose crystallite size，Bioresource. Technol. 109 (2012) 148-153.

DOI: 10.1016/j.biortech.2011.11.122

[5] M.J. Zaini, M.Y.A. Fuad, Z. Ismail, The effect of filler content and size on the mechanical properties of polypropylene/oil palm wood flour composites, Polym. Int. 40 (1996) 51-55.

DOI: 10.1002/(sici)1097-0126(199605)40:1<51::aid-pi514>3.0.co;2-i

[6] N.M. Stark, M.J. Berger, Effect of particle size on properties of wood–flour reinforced polypropylene composites, In: Fourth international conference on wood fiber–plastic composites. (Madison WI): Forest Product Society, (1997).

[7] M.M. Sain, J. Balatinecz, S. Law, Creep fatigue in engineered wood fiber and plastic compositions, J. App. Polym. Sci. 77 (2000) 260-268.

DOI: 10.1002/(sici)1097-4628(20000711)77:2<260::aid-app3>3.0.co;2-h

[8] S. Joseph, M.S. Sreekala, Z. Oommen, A comparisonof the mechanical properties of phe nol formaldehyde composites reinforced with banana fibres and glass fibres, Compos. Sci. Technol. 62 (2002) 1857-1868.

DOI: 10.1016/s0266-3538(02)00098-2

[9] N.M. Stark, R.E. Rowlands, Effects of wood fiber characteristics on mechanical properties ofwood/polypropylene composites, Wood. Fiber. Sci. 35 (2003) 167-174.

[10] C.N.Y. Martin, K. Ahmed, C. Alain, Effect of bark fiber content and size on the mechanical properties of bark/HDPE composites, Compos. Part A: Appl. Sci. Manufac, 41 (2010) 131-137.

DOI: 10.1016/j.compositesa.2009.06.005

[11] Y. Cao, W.H. Wang, H.G. Wang, Q.W. Wang, Effects of preparation method on the flexural properties of WPC, Acta Materials Compositae Sinica. 30 (2013) 311-314.

[12] D.G. Dikobe, A.S. Luyt, Effect of filler content and size on the properties of ethylene vinyl acetate copolymer–wood fiber composites, J. App. Polym. Sci. 103 (2007) 3645-3654.

DOI: 10.1002/app.25513