scholarly journals Modeling the process of surface ribbing of the articles made from wood-polymer composites

2017 ◽  
Vol 6 (4) ◽  
pp. 153-161
Author(s):  
Абразумов ◽  
Vladimir Abrazumov ◽  
Котенко ◽  
Vladimir Kotenko ◽  
Ганиева ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Mathematical Model ◽  
Polymer Composites ◽  
Polymer Composite ◽  
Thermal Environment ◽  
Infrared Heating ◽  
Effective Characteristics ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
Wood Polymer Composite

Here a mathematical model of the process of surface ribbing of pieces made of wood-polymer composites based on solution of an equation of thermal conductivity using effective characteristics of thermal conductivity and thermal capacity of composites with different types of polymer matrixes is offered. А characteristic feature of wood-polymer composite boards, that their linear dimension is bigger than their thickness, was used in creating a mathematical model. This feature provides an opportunity to suppose that while heating the wood-polymer composite board in the thermal environment chаmber with infrared heating element, the change of the temperature will proceed only in the direction which is perpendicular to the surface of the board.

scholarly journals Selected properties of flat-pressed wood-polymer composites for high humidity conditions

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5141-5155
Author(s):  
Piotr Borysiuk ◽  
Jacek Wikowski ◽  
Krzysztof Krajewski ◽  
Radosław Auriga ◽  
Adrian Skomorucha ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Polymer Composite ◽  
Urea Formaldehyde ◽  
Core Layer ◽  
Modulus Of Rupture ◽  
Formaldehyde Resin ◽  
High Humidity ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
Wood Polymer Composite

This study investigated the possibility of applying flat-pressed wood-polymer composites in conditions of high humidity. The experiment involved three variants of wood-polymer composite panels 16 mm thick, and 680 kg per m3 density. The wood particles were bonded with polyethylene. The share of polyethylene in the core layer was fixed at 50%, while in the face layers the content was varied (40%, 50%, or 60%). The following parameters were examined: modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB), screw holding (SH), thickness swelling (TS), water absorption (WA), susceptibility to drilling and milling, wettability and surface free energy, and resistance to mold. The results were compared to particleboard glued with urea-formaldehyde resin. The wood-polymer composite had lower MOR and MOE values and similar IB and SH values. The panels indicated a remarkably higher water resistance (lower TS and WA values) with good surface wettability and high resistance to mold fungi. Additionally, the composites were easier to machine, e.g. drilling or milling, in comparison to standard particleboards.

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.

Application of the modified hybrid rule of mixture (ROHM) and Halpin– Tsai equation for predicting mechanical properties of wood/hemp/polymer composites

2019 ◽  
Vol 106 ◽  
pp. 4-8
Author(s):  
CEZARY GOZDECKI
Keyword(s):  
Mechanical Properties ◽  
Mathematical Models ◽  
Polymer Composites ◽  
Young’S Modulus ◽  
Polymer Composite ◽  
Hybrid Composites ◽  
Young's Modulus ◽  
Wood Polymer ◽  
Wood Particles ◽  
Wood Polymer Composite

Application of the modified hybrid rule of mixture (ROHM) and Halpin–Tsai equation for predicting mechanical properties of wood/hemp/polymer composites. An object of investigations was hybrid wood-polymer composite containing HDPE, hemp fibers and wood particles. The degree of addition of hemp and wood particles ranged from 0 to 60% of filler. The usefulness of the mathematical models ROHM and Halpin-Tsai to predict the Young's modulus of composites was tested. Additionally, experimental research was carried out. It was found that the hemp content in the wood-polymer composite significantly influences the growth of the composite module. The usefulness of mathematical models for predicting the Young's modulus of hybrid composites was also confirmed.

WOOD POLYMER COMPOSITE - MODELING ITS PROPERTIES

2016 ◽  
Vol 8 (3) ◽  
pp. 82-86
Author(s):  
Стородубцева ◽  
Tamara Storodubtseva
Keyword(s):  
Mathematical Model ◽  
Differential Equations ◽  
Polymer Composite ◽  
Input Data ◽  
Wood Polymer ◽  
Input Form ◽  
The Mathematical Model ◽  
Composite Modeling ◽  
Wood Polymer Composite

This article describes a technique for modeling of wood-polymer composite sand. Presented interface input form input data for modeling, differential equations underlying the mathematical model.

Morphological, physical, and mechanical properties of silanized wood-polymer composite

2019 ◽  
Vol 54 (11) ◽  
pp. 1403-1412
Author(s):  
Maryam Ghorbani ◽  
Najmeh Poorzahed ◽  
S Mojtaba Amininasab
Keyword(s):  
Methyl Methacrylate ◽  
Polymer Composite ◽  
Physical And Mechanical Properties ◽  
Infrared Analysis ◽  
Propyl Methacrylate ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
Link Formation ◽  
Wood Polymer Composite ◽  
Composite Samples

For investigation on the effect of silane compound on practical properties of poplar wood polymer composite, samples were impregnated using vacuum/pressure method with 3-trimethoxysilyl propyl methacrylate, and subsequently with styrene, methyl methacrylate, and mixtures of styrene/methyl methacrylate. Field emission scanning electron microscopy observations and Fourier transform infrared analysis indicated that styrene/methyl methacrylate copolymerized with 3-trimethoxysilyl propyl methacrylate and the resultant polymer tightly contacted to the wood cell walls without noticeable gaps. Impregnation with styrene resulted in a higher density of wood polymer composite compared to methyl methacrylate, which was more obvious in the presence of 3-trimethoxysilyl propyl methacrylate. Mechanical strength of the wood polymer composites improved and the highest strength was obtained for the 3-trimethoxysilyl propyl methacrylate/styrene/methyl methacrylate-modified samples. Maximum hardness was found in 3-trimethoxysilyl propyl methacrylate/styrene/methyl methacrylate-modified samples due to the cross-link formation between modified cell wall and polymer.

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
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