Abstract
Although wood/cellulose-plastic composites (WPC) of low wood/cellulose content have been more accepted worldwide and are promoted as low-maintenance, high-durability building products, composites containing high wood/cellulose content are not yet developed on an industrial scale. In this study, flow properties, mechanical properties, and water absorption properties of the compounds of cellulose microfiber/polypropylene (PP) and maleic anhydride-grafted polypropylene (MAPP) were investigated to understand effects of the high cellulose content and the dimensions of the cellulose microfiber. The molding processes studied included compression, injection, and extrusion. It was found that fluidity is not only dependent on resin content but also on the dimension of the filler; fluidity of the compound declined with increased fiber length with the same resin content. Dispersion of the composite was monitored by charge-coupled device (CCD) microscope. Increasing the plastic content in the cellulose-plastic formulation improved the strength of mold in addition to the bond development between resin and filler, and the tangle of fibers. The processing mode affected the physicomechanical properties of the cellulosic plastic. Compression-molded samples exhibited the lowest modulus of rupture (MOR) and modulus of elasticity (MOE) and the highest water absorption, while samples that were injection-molded exhibited the highest MOR (70 MPa) and MOE (7 GPa) and low water absorption (2%).
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Stark NM, Matuana LM (2004) Surface chemistry and mechanical property changes of wood-flour/high-density-polyethylene composites after accelerated weathering. J Appl Polym Sci 94:2263–2273
Heydy M (1998) Ecological considerations on the use and production of biosynthetic and synthetic biodegradable polymers. Polym Degrad Stab 59:3–6
Espert A, Camacho W, Karlson S (2003) Thermal and thermomechanical properties of biocomposites made from modified recycled cellulose and recycled polypropylene. J Appl Polym Sci 89:2353–2360
Li TQ, Wolcott MP (2005) Rheology of wood plastics melt. Part 1. Capillary rheometry of HDPE filled with maple. Polym Eng Sci 45:549–559
Li TQ, Ng CN, Li RKY (2001) Impact behavior of sawdust/ recycled-PP composites. J Appl Polym Sci 81:1420–1428
Takatani M, Ikemiya A, Nagata Y, Kitayama T, Okamoto (2005) Properties of wood flour/thermoplastic polymer composites of high wood content. J Adhes Soc Jpn 41:301–305
La Mantia FP, Morreale M, Mohd Ishak ZA (2005) Processing and mechanical properties of organic filler-polypropylene composites. J Appl Polym Sci 96:1906–1913
Qiu W, Zhang F, Endo T, Hirotsu T (2004) Milling-induced esterification between cellulose and maleated polypropylene. J Appl Polym Sci 91:1703–1709
Qiu W, Endo T, Hirotsu T (2004) Interfacial interactions of a novel mechanochemical composite of cellulose with maleated polypropylene. J Appl Polym Sci 94:1326–1335
Arbelaiz A, Cantero G, Fernández B, Mondragon I, Gañán P, Kenny JM (2005) Flax fiber surface modifications: effects on fiber physico mechanical and flax/polypropylene interface properties. Polym Compos 26:324–332
Oraby W, Hopfenberg HB, Stannett V (2003) Radiation grafting of vinyl monomers onto wood pulp cellulose. Part I. J Appl Polym Sci 15:2987–2998
Li TQ, Wolcott MP (2004) Rheology of HDPE-wood composites. I. Steady state shear and extensional flow. Compos Part A Appl Sci Manufact 35:303–311
Li TQ, Wolcott MP (2006) Rheology of wood plastics melt, part 2: effects of lubricating systems in HDPE/maple composites. Polymer Eng Sci 46:464–473
Li TQ, Wolcott MP (2006) Rheology of wood plastics melt, part 3: nonlinear nature of the flow. Polym Eng Sci 46:114–121
Joseph PV, Oommen Z, Joseph K, Thomas S (2002) Melt rheological behaviour of short sisal fibre reinforced polypropylene composites. J Thermoplast Compos Mater 15:89–114
Caraschi JC, Leão AL (2002) Wood flour as reinforcement of polypropylene. Mater Res 5:405–409
Brandrup J, Immergut EH, Grulke EA, Abe A, Bloch DR (1999) Polymer handbook, 4th edn. Wiley, New York, p II/475
Geimer RL, Clemons CM, Wood JE (1993) Density range of compression-molded polypropylene-wood composites. Wood Fiber Sci 25:163–169
Huang J, Zhang L, Wang X (2003) Soy protein-lignosulphonate plastics strengthened with cellulose. J Appl Polym Sci 89:1685–1689
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Kumari, R., Ito, H., Takatani, M. et al. Fundamental studies on wood/cellulose-plastic composites: effects of composition and cellulose dimension on the properties of cellulose/PP composite. J Wood Sci 53, 470–480 (2007). https://doi.org/10.1007/s10086-007-0889-5
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DOI: https://doi.org/10.1007/s10086-007-0889-5