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Abstract

This study characterized the modulus of elasticity (MOE) and modulus of rupture (MOR) loss, color change, and surface morphological and chemical changes of ricehull—polyethylene (RH/PE) composite after UV weathering. Differences due to smooth, lined, and sawn surface quality were also focused. Samples with smooth surfaces generally exhibited greater and more rapid fading than lined surfaces. Compared to samples with sawn surfaces, samples with smooth surfaces showed much less morphological changes at later time. For samples with sawn surfaces, both MOR and MOE decreased significantly upon weathering. For samples with smooth surfaces, their flexible properties declined slightly during the whole weathering period. Based on FTIR analysis, it was found that both the cellulosic component and PE matrix degraded after weathering and oxidation might occur. This study proved that the smooth surface was more durable in mechanical properties than the other surface textures because of protection from the plastic matrix.

Keywords

polyethylene composite durability rice-hull.

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References

Lundin, T. and Thesis, M.S. (2001). Effect of Accelerated Weathering on the Physical and Mechanical Properties of Natural-Fiber Thermoplastic Composites, Univ. of Wisconsin-Madison.

Falk, R.H. , Lundin, T. and Felton, C. (2000). The Effects of Weathering on Wood-Thermoplastic Composites Intended for Outdoor Applications, 2nd Annual Conference on Durability and Disaster Mitigation in Wood-Frame Housing, Madison, WI, Forest Products Society, pp. 175-179.

Stark, N.M. and Matuana, L.M. (2003). Ultraviolet weathering of photostabilized wood-flour-filled high-density polyethylene, J. Appl. Polym. Sci., 90(10): 2609-2617.

Matuana, L.M. , Kamdem, D.P. and Zhang, J. (2001). Photoaging and stabilization of rigid PVC/wood-fiber composites. J. Appl. Polym. Sci., 80: 1943-1950.

Matuana, L.M. and Kamdem, D.P. (2002). Accelerated ultraviolet weathering of PVC/wood fiber composites, Polym. Eng. Sci. , 42(8): 1657-1666.

Pages, P. , Carrasco, F. , Saurina, J. and Colom, X. (1996). FTIR and DSC study of HDPE structural changes and mechanical properties variation when exposed to weathering aging during Canadian winter, J. Appl. Polym. Sci., 60(2): 153-159.

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

Colom, X. , Canavate, J. , Pages, P. , Saurina, J. and Carrasco, F. (2000). Changes in crystallinity of the HDPE matrix in composites with cellulostic fiber using DSC and FTIR, J. Reinf. Plast. Compos., 19(10): 818-830.

Rangaraj, S.V. and Smith, L.V. (2000). Effects of moisture on the durability of a wood/thermoplastic composite, J. Thermoplast. Compos. Mater., 13(3): 140-161.

10.

Stark, N.M. (2001). Influence of moisture absorption on mechanical properties of wood flour-polypropylene composites, J. Thermoplast. Compos. Mater., 14(5): 421-432.

11.

Wang, W.H. , Wang, Q.W. and Morrell, J.J. (2005). Effects of accelerated soaking and freeze-thaw cycling on rice hull-PE composite, Proceedings of the International Symposium on Research and Effective Utilization of Bio-based Materials, Nanning, Guangxi, China, pp. 426-430.

12.

Camacho, W. and Karlsson, S. (2002). Simultaneous determination of molecular weight and crystallinity of recycled HDPE by infrared spectroscopy and multivariate calibration, J. Appl. Polym. Sci., 85(2): 321-327.

Durability of a Rice-Hull—Polyethylene Composite Property Change After Exposed to UV Weathering

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