Effect of Bamboo Flour (BF) Content on the Dynamic Rheological Characteristics of BF-filled High-density Polyethylene (HDPE)

Yang, Bin; Liang, Chen-Wu; Lu, Fei-Xue; Chen, Peng; Chen, Qinting; Chen, Jin; Hu, Lei; Xia, Ru; Miao, Jibin; Qian, Jiasheng; Min, Kai; Cao, Ming

doi:10.1080/00222348.2018.1535938

Cited by 8 publications

(12 citation statements)

References 22 publications

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“…At even higher wood percentages, filler-filler interactions are dominant, and yield phenomena may appear in some systems ( Figure 1 b, curve D). In confirming this, Yang et al [ 92 ] found that there exists a critical wood content where a network is formed inside the material: below this value, the WPC behavior is more similar to that of a dilute suspension, while, above this value, a 3D-structure made by the wood particles is stable.…”

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 79%

“…The net result is a higher shear and complex viscosity, as well as higher dynamic moduli, but also a Newtonian-like plateau in the complex viscosity curve that terminates at a lower frequency ( Figure 1 b, curve B). The subsequent decay with frequency (similarly to the shear thinning behavior) is steeper in the case of wood filled polymers, and this can be explained by the reduced room available for the polymer chains, due to the presence of the wood fibers [ 55 , 92 ]. The behavior becomes anyway more solid-like at higher frequencies because the polymer chains have less time to disentangle [ 52 ].…”

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

“…At low frequencies (i.e., less than 1 rad/s), if the wood content is below 30 wt.%, the complex viscosity curve displays a Newtonian-like plateau [ 14 , 92 ], and the behavior is mostly influenced by the polymer-polymer interactions. At higher wood content, filler-polymer interactions become more important; thus, the Newtonian plateau reduces and tends to disappear [ 13 , 65 , 77 , 89 , 92 , 95 ], as shown in Figure 1 b (curve C). At even higher wood percentages, filler-filler interactions are dominant, and yield phenomena may appear in some systems ( Figure 1 b, curve D).…”

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

“…At high frequencies, the behavior is qualitatively similar for all wood percentages, with the complex viscosity showing a shear thinning like behavior, that can be modeled as a power law. The effect of the wood particles is limited to the curve becoming steeper at higher filler content ( Figure 1 b) [ 14 , 15 , 53 , 54 , 72 , 77 , 79 , 85 , 86 , 90 , 92 , 93 , 94 , 96 ]. The rheological behavior is, thus, anyway more dependent on the characteristics of the polymeric matrix.…”

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

“…Concerning the dynamic moduli, at increasing wood content, the material has a more solid-like behavior, in that the

and

crossover frequency shifts at lower frequencies ( Figure 1 a) [ 13 , 54 , 90 , 92 ]. Indeed, at sufficiently high wood content and loading frequency, the storage modulus is always greater than the loss modulus and depends on the particular formulation of the material.…”

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

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A Review of Wood Polymer Composites Rheology and Its Implications for Processing

Mazzanti

Mollica

2020

Polymers

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Despite the fact that wood polymer composites are interesting materials for many different reasons, they are quite difficult to shape through standard polymer processing techniques, such as extrusion or injection molding. Rheological characterization can be very helpful for understanding the role played by the many variables that are involved in manufacturing and to achieve a good quality final product through an optimized mix of formulation and processing parameters. The main methods that have been used for the rheological characterization of these materials are capillary and parallel plate rheometry. Both are very useful: rotational rheometry is particularly convenient to investigate the compounding phase and obtain structural information on the material, while capillary viscometry is well suited to understand final manufacturing. The results available in the literature at the moment are indeed very interesting and are mostly aimed at investigating the influence of the material formulation, the additives in particular, on the structural, mechanical, and morphological properties of the composite: despite a good number of papers, though, it is difficult to draw general conclusions, as many issues are still debated. The purpose of this article was to overview the state of the art and to highlight the issues that deserve further investigation.

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Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 79%

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

“…Concerning the dynamic moduli, at increasing wood content, the material has a more solid-like behavior, in that the

and

Section: Wpc Characterization With Rotational Rheometersmentioning

confidence: 99%

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A Review of Wood Polymer Composites Rheology and Its Implications for Processing

Mazzanti

Mollica

2020

Polymers

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Functionalization of molten polyethylene by ozonization and its application in wood fiber reinforced polyethylene composites

Wang

Huang

et al. 2021

Polymer Composites

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Here we report a fast functionalization method of PE using ozone oxidization to improve the interfacial adhesion between wood fiber (WF) and oxidized PE (OPE) for preparing wood-plastic composites (WPC). Low density PE at molten state was oxidized (at 220 C for 1 h) to form polar groups on molecular chains and further mixed with different content of eucalyptus WF. The effect of ozone on the molecular structure of PE and the properties of WPCs were investigated by FTIR, XPS, contact angle test, rheological test, SEM and mechanical tests.After ozonization, the hydrophilicity of PE was greatly improved due to the introduction of oxygen-containing groups. As a consequence, the interfacial adhesion between OPE and WF was greatly enhanced as a result of hydrophilicity of OPE. The tensile elongation at break of OPE/WF was maximum increased by 65% comparing to PE/WF composites. It is an effective method to improve hydrophilicity of PE, which will provide a feasible route for recycling and utilizing of recycled polyethylene.

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Development of sustainable cellulose‐based composite of polypropylene reinforced by recycled microfibrillar poly (ethylene terephthalate)

Khamseh,

Maroufkhani,

Moghanlou

et al. 2023

Polymer Composites

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Sustainable composites based on blends from polypropylene (PP) and recycled polyethylene terephthalate (RPET) and wood flour (WF) were prepared under industry‐relevant conditions by melt extrusion, followed by continuous drawing through spinnerets. Maleic anhydride grafted polypropylene (PP‐g‐MA) was employed to improve the compatibility between matrix and WF. The effects of incorporation of WF and RPET microstructure on the morphological features, rheological measurements, and mechanical properties were investigated. The drawing process converted elliptical RPET phase into highly oriented microfibrillar structure, as characterized by means of scanning electron microscopy (SEM). The highly oriented blend (HOB) represented nonterminal behavior due to the presence of physical networks and enhanced surface area of microfibers for chemical interactions. The tensile strength of neat PP increased by the addition of WF and the existence of microfibrillar RPET phase, whereas the microstructure of RPET had more pronounce effect. The tensile strength and elastic modulus of PP reinforced by WF and oriented RPET improved by 65% and 92%, respectively, demonstrating the high potential of this environmental‐friendly reinforcement method to intensify the mechanical properties of PP.

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Effect of Bamboo Flour (BF) Content on the Dynamic Rheological Characteristics of BF-filled High-density Polyethylene (HDPE)

Cited by 8 publications

References 22 publications

A Review of Wood Polymer Composites Rheology and Its Implications for Processing

A Review of Wood Polymer Composites Rheology and Its Implications for Processing

Functionalization of molten polyethylene by ozonization and its application in wood fiber reinforced polyethylene composites

Development of sustainable cellulose‐based composite of polypropylene reinforced by recycled microfibrillar poly (ethylene terephthalate)

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