Studies on swelling properties of wood/polymer composites based on agro-waste and novolac

2004 ◽  
Vol 23 (1) ◽  
pp. 46-50 ◽  
Author(s):  
S. Mishra ◽  
J. B. Naik ◽  
Y. P. Patil
Keyword(s):  
Polymer Composites ◽  
Swelling Properties ◽  
Wood Polymer ◽  
Wood Polymer Composites

scholarly journals A Study on the Effect of Construction and Demolition Waste (CDW) Plastic Fractions on the Moisture and Resistance to Indentation of Wood-Polymer Composites (WPC)

2021 ◽  
Vol 5 (8) ◽  
pp. 205
Author(s):  
Ville Lahtela ◽  
Timo Kärki
Keyword(s):  
Polymer Composites ◽  
Wood Flour ◽  
Acrylonitrile Butadiene Styrene ◽  
Extrusion Process ◽  
Strength Properties ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Swelling Properties ◽  
Wood Polymer ◽  
Wood Polymer Composites

This paper investigated the moisture and strength properties of wood-polymer composites (WPC), which were made using three different recycled polymers using wood flour as filler. The recycled polymers were acrylonitrile butadiene styrene (ABS), polypropylene (PP), and polyethylene (PE), which were collected from among the construction and demolition waste (CDW) at a local waste management center. The commercial additives, such as a coupling agent and lubricant, were also included in the materials. Composite materials were manufactured with an agglomeration and an extrusion process. Water absorption and thickness swelling properties of composites, based on the recycled ABS and PE, were restricted compared to the recycled PP. The strength properties of WPC were determined with two methods, a traditional Brinell hardness and resistance to indentation. Using an ABS polymer as a matrix in the composite, the moisture and strength properties were improved. The recycled PP polymer caused these properties to be lowered, especially in the case of moisture properties. This study has shown that the method used can affect the measured value of certain properties. In addition, the sorting of recycled polymer fractions is desirable for the appearance of improved properties.

Water Absorption of Wood-Polymer Composites Based on PVC with Partial Replacement of Wood Filler by Mineral One

2019 ◽  
Vol 770 (5) ◽  
pp. 62-66
Author(s):  
A.A. ASKADSKII ◽  
◽  
T.A. MATSEEVICH ◽  
V.I. KONDRASHCHENKO ◽  
◽  
...  
Keyword(s):  
Water Absorption ◽  
Polymer Composites ◽  
Partial Replacement ◽  
Wood Polymer ◽  
Wood Polymer Composites

scholarly journals Rheological Basics for Modeling of Extrusion Process of Wood Polymer Composites

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 622
Author(s):  
Krzysztof Wilczyński ◽  
Kamila Buziak ◽  
Adrian Lewandowski ◽  
Andrzej Nastaj ◽  
Krzysztof J. Wilczyński
Keyword(s):  
Polymer Composites ◽  
Process Modeling ◽  
Slip Flow ◽  
Extrusion Process ◽  
Process Conditions ◽  
Rheological Models ◽  
Wood Polymer ◽  
Slip Effects ◽  
Process Simulations ◽  
Wood Polymer Composites

Wood polymer composites are materials with pseudoplastic and viscoelastic properties. They have yield stress and exhibit slip during flow. Studies on extrusion and rheology, as well as on process modeling of these highly filled materials are limited. Extensive rheological and extrusion modeling studies on the wood polymer composite based on the polypropylene matrix were performed. Viscous and slip flow properties were determined (with Rabinowitsch, Bagley, and Mooney corrections) at broad (extrusion) range of shear rate and temperature, using a high-pressure capillary rheometer. Rheological models of Klein and power-law were used for flow modeling, and Navier model was applied for slip modeling. A novel global computer model of WPC extrusion with slip effects has been developed, and process simulations were performed to compute the extrusion parameters (throughput, power consumption, pressure, temperature, etc.), and to study the effect of the material rheological characteristics on the process flow. Simulations were validated experimentally, and were discussed with respect to both rheological and process modeling aspects. It was concluded that the location of the operating point of extrusion process, which defines the thermo-mechanical process conditions, is fundamentally dependent on the rheological materials characteristics, including slip effects.

scholarly journals Dielectric Properties of Wood-Polymer Composites: Effects of Frequency, Fiber Nature, Proportion, and Chemical Composition

2021 ◽  
Vol 5 (6) ◽  
pp. 141
Author(s):  
Imen Elloumi ◽  
Ahmed Koubaa ◽  
Wassim Kharrat ◽  
Chedly Bradai ◽  
Ahmed Elloumi
Keyword(s):  
Dielectric Properties ◽  
Polymer Composites ◽  
Wide Frequency Range ◽  
Dielectric Constants ◽  
Cellulose Content ◽  
Wood Fibers ◽  
Low Frequencies ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
New Applications

The characterization of the dielectric properties of wood–polymer composites (WPCs) is essential to understand their interaction with electromagnetic fields and evaluate their potential use for new applications. Thus, dielectric spectroscopy monitored the evolution of the dielectric properties of WPCs over a wide frequency range of 1 MHz to 1 GHz. WPCs were prepared using mixtures of different proportions (40%, 50%, and 60%) of wood and bark fibers from various species, high-density polyethylene, and maleated polyethylene (3%) by a two-step process, extrusion and compression molding. Results indicated that wood fibers modify the resistivity of polyethylene at low frequencies but have no effect at microwave frequencies. Increasing the fiber content increases the composites’ dielectric properties. The fibers’ cellulose content explains the variation in the dielectric properties of composites reinforced with fibers from different wood species. Indeed, composites with high cellulose content show higher dielectric constants.

scholarly journals Analysis of Creep of Wood-Polymer Composites

2021 ◽  
Vol 1079 (4) ◽  
pp. 042022
Author(s):  
M A Elesin ◽  
N A Mashkin ◽  
V F Khritankov ◽  
N V Karmanovskaya
Keyword(s):  
Polymer Composites ◽  
Wood Polymer ◽  
Wood Polymer Composites

Analysis of wood polymer composites by two-stage pyrolysis–GC/MS

2008 ◽  
Vol 83 (2) ◽  
pp. 213-219 ◽  
Author(s):  
Clemens Schwarzinger ◽  
Manuela Leidl ◽  
Robert Putz
Keyword(s):  
Polymer Composites ◽  
Two Stage ◽  
Wood Polymer ◽  
Wood Polymer Composites

Mechanical Properties and Decay Resistance of Wood Polymer Composites (WPC)

2011 ◽  
Vol 264-265 ◽  
pp. 819-824 ◽  
Author(s):  
Md. Rezaur Rahman ◽  
Sinin Hamdan ◽  
M. Saiful Islam ◽  
Md. Shahjahan Mondol
Keyword(s):  
Polymer Composites ◽  
Young’S Modulus ◽  
Modulus Of Elasticity ◽  
Young's Modulus ◽  
Decay Resistance ◽  
Modulus Of Rupture ◽  
Wood Polymer ◽  
Static Young’S Modulus ◽  
Wood Polymer Composites ◽  
Wood Polymer Composite

In Malaysia, especially Borneo Island Sarawak has a large scale of tropical wood species. In this study, selected raw tropical wood species namely Artocarpus Elasticus, Artocarpus Rigidus, Xylopia Spp, Koompassia Malaccensis and Eugenia Spp were chemically treated with sodium meta periodate to convert them into wood polymer composites. Manufactured wood polymer composites were characterized using mechanical testing (modulus of elasticity (MOE), modulus of rupture (MOR), static Young’s modulus) and decay resistance test. Modulus of elasticity and modulus of rupture were calculated using three point bending test. Static Young’s modulus and decay resistance were calculated using compression parallel to gain test and natural laboratory decay test respectively. The manufactured wood polymer composites yielded higher modulus of elasticity, modulus of rupture and static Young’s modulus. Wood polymer composite had high resistant to decay exposure, while Eugenia Spp wood polymer composite had highly resistant compared to the other ones.

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