A comparison of compounding processes and wood type for wood fibre—PP composites

Błędzki, Andrzej K.; Letman, M.; Vīksne, Armanda; Rence, Ligita

doi:10.1016/j.compositesa.2004.10.029

Cited by 186 publications

(132 citation statements)

References 9 publications

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“…(%) of filler. This result agrees with some literature sources that claim that the presence of maleated PP does not influence stiffness 20,23 . However, in the case of the composite containing 10 wt.…”

Section: Tensile Testssupporting

confidence: 83%

Studies on the properties of rice-husk-filled-PP composites: effect of maleated PP

et al. 2009

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Rice husk is a by-product of rice milling process that usually finds inadequate final disposal (burning, land filling). Thermoplastics composites filled with rice husk flour are materials that offer an alternative for using this agricultural resource viewing the production of low dense materials with some specific properties. In this work composites of polypropylene (PP) and rice husk flour (RHF) were prepared by melt extrusion. Maleic anhydridemodified PP (MAPP) was added as a coupling agent. It was verified that tensile strength decreased with filler loading. The presence of MAPP improved this property showing a strong dependence on the MAPP/RHF ratio (MAPP/RHF = 0.03 produced the best results). The density of the composites slightly increased with filler and coupling agent in comparison to pure PP. The presence of MAPP diminished more than 20% water uptake in highly-loaded composites.

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Section: Tensile Testssupporting

confidence: 83%

Studies on the properties of rice-husk-filled-PP composites: effect of maleated PP

et al. 2009

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“…Twin-screw extrusion is a high shear process that can help to match a good fibre dispersion. Bledzki et al (2005) observed better mechanical properties by compounding PP and wood in a twin-screw extruder compared to high speed mixer and two-roll mill. Nevertheless, extrusion leads to several fibre breakages.…”

Section: Introductionmentioning

confidence: 93%

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Gamon

Evon

Rigal

2013

Industrial Crops and Products

120

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. b s t r a c tNatural fibres from miscanthus and bamboo were added to poly(lactic acid) by twin-screw extrusion. The influence of extruder screw speed and of total feeding rate was studied first on fibre morphology and then on mechanical and thermal properties of injected biocomposites. Increasing the screw speed from 100 to 300 rpm such as increasing the feeding rate in the same time up to 40 kg/h helped to preserve fibre length. Indeed, if shear rate was increased with higher screw speeds, residence time in the extruder and blend viscosity were reduced. However, such conditions doubled electrical energy spent by produced matter weight without significant effect on material properties. The comparison of four bamboo grades with various fibre sizes enlightened that fibre breakages were more consequent when longer fibres were added in the extruder. Longer fibres were beneficial for material mechanical properties by increasing flexural strength, while short fibres restrained material deformation under heat by promoting crystallinity and hindering more chain mobility.

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“…Such materials offer significant advantages, which justify their use. Wood flour is obtained from natural resources, it is available in various forms in large quantities, light, cheap, and it can be added to commodity matrices in considerable amounts thus offering economically advantageous solutions [1][2][3][4]. The main drawbacks of such composites are their water sensitivity and relatively poor dimensional stability, changing wood fiber characteristics with origin and the time of the harvest, and poor adhesion to basically all matrix polymers [4,5].…”

Section: Introductionmentioning

confidence: 99%

Wood flour filled PP composites: Compatibilization and adhesion

Dányádi

Janecska²,

Szabó³

et al. 2007

Composites Science and Technology

199

104

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A comparison of compounding processes and wood type for wood fibre—PP composites

Cited by 186 publications

References 9 publications

Studies on the properties of rice-husk-filled-PP composites: effect of maleated PP

Studies on the properties of rice-husk-filled-PP composites: effect of maleated PP

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Wood flour filled PP composites: Compatibilization and adhesion

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