PVT Measurement System for Wood Plastic Composite Melt in an Extrusion Process

Sadeghian, Nasser; Golzar, Mohammad

doi:10.1177/0731684407084250

Cited by 11 publications

(9 citation statements)

References 5 publications

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“…According to the results, using dynamic viscosity for the composites with the high wood contents, the consistency and power law indexes values will converge to those of Method 1; however for the WPCs having low wood contents, using complex viscosity yields closer values to those of Method 1. In another similar research with the same material, for the compcccccosite containing 40 wt% of wood, the value for power law index (n) was obtained as 0.87, 17 which is noticeably high in comparison with those obtained by the other researches. 18 But the results of power law index in the current study for WPCs with different wood contents are closer to the other reported values.…”

Section: Resultsmentioning

confidence: 80%

Mathematical and experimental study on flow of wood plastic composite to acquire its constitutive equation

Golzar

Jam

Behravesh

2012

Journal of Reinforced Plastics and Composites

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This article presents a study on the rheological behavior of wood plastic composites with a mathematical approach to acquire their melt constitutive equation. The wood plastic composites were produced with four compositions of high density polyethylene as the matrix and very fine wood particles, smaller than 50 mm in size, as the fillers: 40, 50, 60 and 70 wt% of wood content. Storage modulus (G 0 ), loss modulus (G 00 ), complex viscosity (*) were measured for all four composites at a temperature of 170 C and for shear rates in the range of 1-500 rad/s. The results indicated a noticeable increase in all measured properties upon increasing the wood content. In mathematical approach, the main goal was to obtain the most fitted expression to relate shear stress with shear rate. Firstly power law model was applied considering a viscous behavior of the composites. In continue, generalized Maxwell model was used and the most fitted number of the elements in modeling was analyzed for various wood contents. Moreover, Cox-Merz rule was evaluated for the composites, where it showed that this rule is only valid for the composites in some special conditions.

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Section: Resultsmentioning

confidence: 80%

Mathematical and experimental study on flow of wood plastic composite to acquire its constitutive equation

Golzar

Jam

Behravesh

2012

Journal of Reinforced Plastics and Composites

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“…where ρ is the sample density in g/cm 3 , a is the sample weight in air in g, w is the sample weight in water in g, and water ρ is the density of the water in g/cm 3 .…”

Section: Actual Density Measurementmentioning

confidence: 99%

“…Hence, HYP has been used not only for its low lignin content, but also for its potential thermal stability and its strong adhesion when it is bonded with hightemperature engineering thermoplastic polymers [3] [4] [5] [6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Lithium Chloride on the Fibre Length Distribution, Processing Temperature and the Rheological Properties of High-Yield-Pulp-Fibre-Reinforced Modified Bio-Based Polyamide 11 Composite

Cherizol¹,

Sain²,

Tjong³

2017

ANP

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The aim of this work was to investigate the effect of lithium chloride (LiCl) on the fibre length distribution, melting temperature and the rheological characteristics of high yield pulp fibre reinforced polyamide biocomposite. The inorganic salt lithium chloride (LiCl) was used to decrease the melting and processing temperature of bio-based polyamide 11. The extrusion method and Brabender mixer approaches were used to carry out the compounding process. The densities and fibre content were found to be increased after processing using both compounding methods. The HYP fibre length distribution analysis realized using the FQA equipment showed an important fibre-length reduction after processing by both techniques. The rheological properties of HYP-reinforced net and modified bio-based polyamide 11 "PA11" (HYP/PA11) composite were investigated using a capillary rheometer. The rheological tests were performed in function of the shear rate for different temperature conditions. The low-temperature process compounding had higher shear viscosity; this was because during the process the temperature was low and the mixing and melting were induced by the high shear rate created during compounding process. Experimental test results using the extrusion process showed a steep decrease in shear viscosity with increasing shear rate, and this melt-flow characteristic corresponds to shear-thinning behavior in HYP/PA11, and this steep decrease in the melt viscosity can be associated to the hydrolyse reaction of nylon for high pulp fibre moisture content at high temperature. In addition to the low processing temperature, the melt viscosity of the biocomposite us- 49ing the Brabender mixer approach increases with increasing shear rate, and this stability in the increase even at high shear rate for high pulp moisture content is associated to the presence of inorganic salt lithium chloride which creates the hydrogen bonds with pulp during the compounding process.

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“…The reinforcement filler in thermoplastic composite material was wood flour and thermosetting resin was used as the binder material. The advantage of using thermosetting resin over thermoplastic resin is that they have improved temperature resistance, resistance to deformation, superior mechanical property [51,52]. The additive manufacturing technique offers the advantage of inducing the alignment of fibrous material within a product to enhance the mechanical strength.…”

Section: Glass Fiber Reinforced Compositesmentioning

confidence: 99%

A Review on Properties of Aerospace Materials Through Additive Manufacturing

2017

IJMTER

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Abstract-Additive Manufacturing (AM) process has been effective in producing materials that are being utilized by the aerospace industry in order to improve their performance by increasing their properties. Industry now opts for this technique over conventional methods as it has enormous advantages and applications. This Additive Manufacturing process is capable of producing complex near net shape of parts. The materials that are produced by this technique for aerospace industries are metal alloys, metal matrix composites, polymer matrix composites, ceramic matrix composites and nano-composites. Many of the composite materials are still under research and development. In this study, a literature review on the mechanical properties of the materials that are used in the aerospace industry by AM process is discussed and these properties are also compared with the materials produced by conventional methods. The purpose of this review is to highlight the importance of Additive Manufacturing technique and also understand the effect of this process on the materials tested. During this work, the evolution of materials in the aerospace sector, the basic concept of AM technique, the application of the materials, the properties obtained when processing is done, the limitations and the scope for research are given.

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PVT Measurement System for Wood Plastic Composite Melt in an Extrusion Process

Cited by 11 publications

References 5 publications

Mathematical and experimental study on flow of wood plastic composite to acquire its constitutive equation

Mathematical and experimental study on flow of wood plastic composite to acquire its constitutive equation

Effect of Lithium Chloride on the Fibre Length Distribution, Processing Temperature and the Rheological Properties of High-Yield-Pulp-Fibre-Reinforced Modified Bio-Based Polyamide 11 Composite

A Review on Properties of Aerospace Materials Through Additive Manufacturing

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