Production and properties of waste wood fibers / polypropylene composites by reactive extrusion using silane-based compatibilizers

Consisting running out of the petroleum and the globalization of enviromental problems created by industrial activities fort he production of synthetic products has increased the importance of biproducts (biomass product)studies.Nowadays,thanks to the advances in biochemistry and engineering,new products that are compatible with environmental values taking place from agricultural and other suistainable sources.The vegatable waste,50-65 Mtons/year(millions tonnes)is emergenging in Turkey. Most of them can not be evaluated don't contribute to the economy as additional cost such as pickup and destruction. Altough having difficulties in working with plant wastes (agricultural,forest,etc), which are biomasses of lingnoselulosic structure, cellulose and lignin are important sources of polymers. Also chemical structure of the aromatic compounds and many functionalities are allow the production of various chemicals and product.As the tradional petroleum-derived composites are not sustainable and/or don't degrade in nature, ecological risks face in the world also enviromental priority, "green composites" (composites derived from matural sources) intensely increased interest and work on green composites with the potential to be an alternative.However,concerns about waste generated after use limit the spread of polymeric materials in many areas.Green composites are used in a wide range of applications from aerospace and automotive industry to household appliances thanks to their light weight, good mechanical properties,ease of process,acoustic properties and so on. In this study, biocomposites, which contain polypropylene (PP) matrix, and factory waste wood flour (AAU) are produced and their performance characteristics are examined. The aim of this study is to investigate the biocomposites to be formed by evaluating the factory waste wood flours which are found in our country.Reactive extrusion method is tested to activate the silane compound which is used as the first step in biocomposites produced by using wood flour which is abundant in our country as factory waste, on the other hand, maleic anhydride grafted polypropylene (MAPP) doped composites and silane doped composites were compared for PP.The samples obtained by adding different rate of PP and waste wood flour in different compositions and the effects of the proportions of the ingredients were compared.Tensile, bending and impact tests were performed on biocomposites produced by twin screw extruder to explain mechanical properties. Besides mechanical tests, FTIR analysis was used to determine chemical bond stresses and TGA analysis was performed to determine thermal properties.In order to determine the physical properties of density, water uptake rate and thickness increase tests were conducted. Following the production studies the scanning electron microsope (SEM) was used to examine the internal structure. As a result, it was found that the composites produced with PP / AAU and silane additive had lower tensile and flexural strength than MAPP additive and the tensile and flexural modulus showed higher values than pure PP due to the chemical structure of the samples containing wood flour water intake and swelling rates. It was determined that water intake and swelling rates were higher due to the chemical structure of the products containing wood flour.When the compatibilizers were compared, it was found that PP worked better with maleic anhydride-grafted polypropylene and not with silane compatibilizer. In this thesis, environmentally friendly biocomposites with improved mechanical and physical properties were produced as a reinforcing material of wood flour, which is currently considered as waste by factories as waste.