Mechanical characterization of polypropylene–wood flour composites

Nuñez, Adrian J.; Sturm, Pablo C.; Kenny, J. M.; Aranguren, Mirta I.; Marcovich, Norma Esther; Reboredo, María Marta

doi:10.1002/app.11738

Cited by 145 publications

(102 citation statements)

References 23 publications

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“…[1][2][3][4] In North America, large amounts of WPC are being produced to replace wood in the decking and railing industry. The industry trend is to produce WPC with high wood content, such as 50 wt % or higher, to increase their economic competitiveness.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the uniformity of high‐density polyethylene/wood fiber composites in a twin‐screw extruder

Zhang

Park

Rizvi

et al. 2009

J of Applied Polymer Sci

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Uniform dispersion of wood fiber in highdensity polyethylene can improve the mechanical properties and surface finish of the wood plastic composites. However, it is difficult to achieve uniform dispersion when the wood content is high, due to its low thermal stability, incompatibility with polymer, and affinity for agglomeration. This work was undertaken to improve the uniformity of high-density polyethylene/wood composites by designing screw configurations, optimizing screw speed, and altering material compositions. The rheological properties and scanning electron microscope micrograph were used to characterize the uniformity. The results showed that the medium dispersive and distributive mixing, medium screw speed, and lubricant were all beneficial in improving uniformity.

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Section: Introductionmentioning

confidence: 99%

Investigation on the uniformity of high‐density polyethylene/wood fiber composites in a twin‐screw extruder

Zhang

Park

Rizvi

et al. 2009

J of Applied Polymer Sci

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“…이에 본 연구에서는 비교적 높은 강도를 나타낼 수 있는 재료인 목분과 폴리프로필렌(Polypropylene)을 사용하는 WPC (Wood Powder Composite) 복합재료를 연구하였다. 일반적 으로 목분과 폴리프로필렌을 혼합하게 되면 낮은 기계적 강도를 나타내게 된다 [4][5][6]. 그 이유는 친수성 목분과 소수 성 PP와의 낮은 상용성 때문이다.…”

Section: 서 론unclassified

The Effect of Surface-Modification of Wood Powders by Plasma Treatment of Propylene on the Mechanical Properties of Wood Powder/PP Composites

Cho¹,

Ha²,

Kim³

et al. 2017

Composites Research

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Wood powders were surface-modified by plasma-treating propylene to make them compatible with PP matrix in WPC(wood powder composite). The plasma treatment of propylene resulted in the deposition of an ultrathin hydrophobic film which had the chemical structure similar to that of polypropylene. Wood powder and polypropylene were mixed to pellets by twin screw extruder and then 50 wt% wood powder/PP composites were produced by an injection machine. Tensile strength and flexural strength were improved by 7.59% and 12.43% at the maximum respectively. SEM (Scanning Electron Microscopy) observation on the fracture surface revealed that the treatment improved the interfacial bonding and the mechanical properties of the composites.

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“…After the removal of the load, the final deformations of the composites decreased firstly, and then they increased within the range of the time analyzed. A possible reason for this may be that the lignin can react with the epoxy resin to act as a part of the resin chain segments, which increased the rigidity of the composites (Nuñez et al 2003). Although the addition of the wood flour can potentially increase the composites' Young's modulus, it had little influence on the rigidity of the molecular chain segments.…”

Section: Creep and Creep Recoverymentioning

confidence: 99%

Preparation and Properties of Wood Flour Reinforced Lignin-Epoxy Resin Composite

Liu

2016

BioResources

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A lignin-epoxy resin composite was prepared by blending lignin/wood flour with an epoxy resin and polyamine. The effects of the wood flour on the mechanical, thermal creep, and creep recovery properties, as well as the microstructure of the composite, were studied. Among the mechanical properties, the initial modulus increased with increasing content of wood flour. The glass transition temperature (Tg) decreased, and the thermal stability first decreased and then increased, as the wood flour content increased. As the wood flour's particle size was decreased, the initial modulus and other mechanical properties first increased and then decreased slightly. The Tg increased, and the thermal stability first decreased and then increased. The creep resistances of the composite were improved after the addition of the wood flour, and the 40 to 60 mesh wood flour exhibited better improvement than 60 to 120 mesh. The scanning electron microscopy (SEM) analysis revealed good interfacial bonding between the lignin, epoxy resin, and wood flour. Fiber breakage and fiber pullout were the main failure modes observed in this study.

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Mechanical characterization of polypropylene–wood flour composites

Cited by 145 publications

References 23 publications

Investigation on the uniformity of high‐density polyethylene/wood fiber composites in a twin‐screw extruder

Investigation on the uniformity of high‐density polyethylene/wood fiber composites in a twin‐screw extruder

The Effect of Surface-Modification of Wood Powders by Plasma Treatment of Propylene on the Mechanical Properties of Wood Powder/PP Composites

Preparation and Properties of Wood Flour Reinforced Lignin-Epoxy Resin Composite

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