Effect of Laboratory Aging on the Physical and Mechanical Properties of Wood-Polymer Composites

2009 ◽  
Vol 22 (2) ◽  
pp. 227-243 ◽  
Author(s):  
Sreekala G. Bajwa ◽  
Dilpreet S. Bajwa ◽  
Alexander S. Anthony
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Physical And Mechanical Properties ◽  
Wood Polymer ◽  
Wood Polymer Composites

scholarly journals Regarding some mechanical properties of terrace board made of wood-polymer composites with different filler

2021 ◽  
Vol 12 (2) ◽  
pp. 33-39
Author(s):  
N. V. Buiskykh
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Polymer Composites ◽  
Modulus Of Elasticity ◽  
Abrasion Resistance ◽  
Physical And Mechanical Properties ◽  
Wood Waste ◽  
Bending Modulus ◽  
Wood Polymer ◽  
Wood Polymer Composites

One of the areas of wood waste processing is their use in the production of wood-polymer composites (WPC). The relevance of wood-polymer products is due to the wide range of applications and qualities of this material. WPC does not rot, is not damaged by insects and fungi, does not contain harmful binders. Products from the duodenum do not crack, do not gouge, are waterproof, which makes them an excellent material for manufacturing a terrace board. However, the terrace board must have certain mechanical qualities, which will allow it to be used in fairly harsh conditions - under the action of humidity, UV radiation and under a certain load. This study aimed to determine the main physical and mechanical properties (density, strength at static bending, modulus of elasticity, water absorption, hardness, abrasion resistance, changes in linear dimensions with changing atmospheric environment) samples of terrace board manufacturing from duodenum with different fillers. Samples from a hollow terrace board, which were filled with polyethylene (PE) and polyvinyl chloride (PVC), were used for the study. Based on experimental studies, it was found that the density of both samples is quite high, close to the maximum; the difference is not significant, but when examining microslices under a microscope in samples with PE as a binder, a larger number of voids is observed, indicating the presence of excess moisture or lack of mineral fillers. It may also indicate the destruction of the polymer. It was determined that a number of other important indicators such as strength at static bending, modulus of elasticity, water absorption, abrasion resistance were the best in the samples with a filler of polyvinylchloride. The greatest difference was in the bending strength index and was 35%. It was also found that the hardness of both samples were equivalent. However, the modulus of elasticity of the sample with a filler with PE exceeded the performance of the sample with a filler with PVC by almost 2.5 times. Thus, based on the research, it is possible to identify a number of clear relationships that indicate that theuse of polyvinylchlorideas a binder significantly improves the physical and mechanical properties of the terrace board based on wood-polymer composite. The results of the research will solve the problem of improving the strength characteristics of wood-composite material to expand the range based on wood waste Keywords: density, hardness, modulus of elasticity, water absorption, abrasion resistance.

Physicochemical WPC Modification Techniques

2021 ◽  
Vol 887 ◽  
pp. 144-150
Author(s):  
A.E. Shkuro ◽  
A.V. Artyomov ◽  
A.V. Savinovskikh
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Benzoyl Peroxide ◽  
Uv Irradiation ◽  
Polymer Matrix ◽  
Brinell Hardness ◽  
Physical And Mechanical Properties ◽  
Irradiation Intensity ◽  
Wood Polymer ◽  
Wood Polymer Composites

The paper studies issues related to physicochemical and chemical techniques for the modification of wood-polymer composites with a thermoplastic polymer matrix (WPCs) to improve their physical and mechanical properties. The physicochemical modification was performed by photochemical crosslinking with the exposure of WPC specimens to UV irradiation. Chemical modification was performed by introducing benzoyl peroxide into the material composition, leading to chemical crosslinking of polyethylene macromolecules of the WPC polymer matrix. As a result of the study, quantitative characteristics of the effect of the benzoyl peroxide content in the composite, as well as the WPC specimen UV irradiation intensity and duration on the basic physical and mechanical properties of the material have been obtained. The efficiency of physicochemical techniques for modifying WPCs has been estimated by changing the specimen properties such as Brinell hardness, water absorption, and impact strength. It has been found that the Brinell hardness increases by 80 % as compared to unmodified WPC specimens. Effective modification of wood-polymer composites with polymer matrices based on high-density polyethylene may lead to a significant improvement in the quality of products made of these materials.

Die drawn wood polymer composites. I. Mechanical properties

2010 ◽  
Vol 70 (1) ◽  
pp. 45-52 ◽  
Author(s):  
I. Połeć ◽  
P.J. Hine ◽  
M.J. Bonner ◽  
I.M. Ward ◽  
D.C. Barton
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Wood Polymer ◽  
Wood Polymer Composites

scholarly journals Physical and mechanical properties of composites based on polypropylene and timber industry waste

2014 ◽  
Vol 4 (4) ◽  
Author(s):  
Janis Kajaks ◽  
Karlis Kalnins ◽  
Sandris Uzulis ◽  
Juris Matvejs
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Chemical Interaction ◽  
Physical And Mechanical Properties ◽  
Maleated Polypropylene ◽  
Industry Waste ◽  
Wood Polymer ◽  
Strong Adhesion ◽  
Improve Water Resistance ◽  
Properties Of Composites

AbstractWood polymer composites (WPC) are widely used materials in different industries because of many application, processing and recycling advantages compared to traditional thermoplastic polymer composites containing mineral fillers [1]. However, the commercial success of these materials primarily depends on improvements in moisture performance, and ability to use recycled and waste material as a wood filler. The research regarding WPC is focused on the chemical interaction between dissimilar material components with an aim to provide strong adhesion to the surface of wood filler-polymer matrix [2]. The goal of this paper was to present results of investigations of exploitation properties of composites containing different plywood production industry byproducts and polypropylene. It was shown that modification of all composites with coupling agent maleated polypropylene (MAPP) considerably improve physical mechanical properties (tensile, flexural, impact strength) of WPC. MAPP (5 wt.%) additions also significantly improve water resistance of WPC. SEM investigations confirmed positive action of interfacial modifiers on strengthening of adhesion interaction between components wood and PP matrix that give considerable increase of exploitation properties of the WPC.

scholarly journals Atık Alüminyum Polietilen ve Pirinç Sapı Kullanılarak Üretilen Ahşap Polimer Kompozitlerin Mekanik Davranışlarının Belirlenmesi / Determination of Mechanical Behaviour of Wood Polymer Composites Manufactured Using Waste Aluminium Polyethylene

2013 ◽  
Vol 1 (4) ◽  
pp. 334
Author(s):  
Alperen Kaymakcı
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Rice Husk ◽  
Mechanical Behaviour ◽  
Injection Molding Process ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
Tetra Pak ◽  
Rice Husk Flour

İki ya da daha fazla materyalin bir araya getirilmesi ile oluşan ve çoğu zaman kendilerini oluşturan materyallerden daha faydalı özelliklere sahip olan malzemelere kompozit malzeme denmektedir. Termoplastik esaslı polimer kompozitlerin üretiminde ise lignoselülozik materyaller ile polietilen (PE), polipropilen (PP), polivinil klorür (PVC) gibi plastikler kullanılmaktadır. Lignoselülozik materyaller ve termoplastik esaslı polimerlerin karışımıyla, plastik içerikli ürünlere benzer yöntemlerle üretilen malzemelere Ahşap-polimer kompozitleri (APK) denir. Ahşap polimer kompozit üretiminde çeşitli organik ve inorganik dolgu maddeleri kullanılmaktadır. Kalsiyum karbonat, talk, kalsiyum sülfat, alüminyum silikat ve Titanyum Dioksit gibi inorganik dolgu maddelerinin fiyatının pahalı oluşu ve makine aksamında yapmış olduğu aşınma dolayısıyla araştırmacılar ve endüstri kuruluşları alternatif dolgu materyali arayışına girmiştir. İnorganik dolgu materyaline alternatif olarak düşünülen buğday sapı, odun unu, orman endüstri atıkları ve yıllık bitkiler gibi organik dolgu maddeleri doğada bol olarak bulunmaları ve fiyatının ucuz oluşu dolayısıyla oldukça büyük avantajlar sağlamaktadır. Organik dolgu maddeleri ürünün maliyetini düşürdüğü gibi aynı zamanda ciddi performans artışları da sağlamaktadır. APK üretiminde saf (bakir) plastik kullanılabildiği gibi geri dönüşüm plastiklerde kullanılabilmektedir. Ülkemizdeki mevcut orman endüstrisinin oluşturmuş olduğu atıklar ve tarımsal atıklar ve bunun yanı sıra oluşan ciddi plastik atığı göz önüne alındığında bu tip malzemelerin APK üretiminde değerlendirilmesi potansiyeli görülmektedir. Bu nedenle ülkemizdeki tarımsal ve orman endüstrisi atıkları kullanılarak saf veya geri dönüşüm plastiklerle OPK üretiminde, üretim parametrelerinin ve üretilen malzemelerin özelliklerin belirlenmesi, bu potansiyeli ortaya çıkarmak için zaruri hale gelmiştir. Bu çalışmada atık alüminyum polietilen (Tetrapak) ve atık pirinç saplarından elde edilen unlar kullanılarak ahşap polimer kompozitler üretilmiştir. Ekstrüzyon ve enjeksiyon kalıplama işlemlerine tabi tutularak üretilen kompozitler üzerinde çekme ve eğilme direnci dayanımı testleri gerçekleştirilmiştir. Kompozit bünyesindeki pirinç sapı unu miktarındaki artışın kompozitlerin çekme ve eğilmede elastikiyet modülü değerlerini iyileştirdiği ancak kompozitlerin çekme, eğilme direnci değerlerinde genel olarak bir azalmaya sebep olduğu tespit edilmiştir. Determination of Mechanical Behaviour of Wood Polymer Composites Manufactured Using Waste Aluminium Polyethylene (Tetra Pak) and Brass Handle In this study, we evaluated some mechanical properties of aluminum polyethylene (Tetra Pak) composites reinforced with rice husk flour. To meet this objective, rice husk flour was compounded with aluminum polyethylene with coupling agent (MAPE) in a twin screw co-rotating extruder and then was manufactured by injection molding process. The modulus in the flexural and tensile improved with increasing rice husk flour content while the tensile and flexural strengths of the samples decreased. The use of maleic anhydride polyethylene had a positive effect on the mechanical properties of the aluminum polyethylene composites reinforced with rice husk flour. This work showed that the composites treated with maleated polyethylene could be efficiently used as decking products, due to satisfactory mechanical properties of the composites.

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