Mechanical And Rheological Characteristics

Mechanical And Rheological Characteristics

Mechanical And Rheological Characteristics

Question:

Discuss About The Mechanical And Rheological Characteristics Of Wood Saw Dust.

Answer:

Introduction

The world is focusing on improving the environment safety in every country. The wood plastic is a blend made up of wood sawdust and the recycled plastic. These two components, polypropylene, and plastic undergo polymer blending. Polymers are slowly gaining fame in the industry as a new commodity. The standard procedure used in the process of polymer blends is the thermoplastic vulcanization, TPV. Recycling and reuse of waste materials are making the environment cleaner than it was some years back. According to statistics on the report generated by USEPA, about 8.25 million tons of plastic are collected in Europe, another 246 million tons of solid waste was obtained by the US municipal in the year 2005. On an annual basis, the UK records up to 500,000 tons of waste plastics that need recycling. Researchers have discovered ways to use the waste materials to come up with different components which can be used as household or industrial components (Irina, et al., 2016). In this research paper, the primary focus is on the wood sawdust and plastic blending with or without the anhydride compatibilizer. A compatibilizer is implemented during the polymer blending to ensure that the components being combined attain a good adhesion within the polymers.

Wood Sawdust

The furniture industry is growing with new trends and furniture designs from different trees being modeled. The wood saw dust is a by-product of the furniture. It is obtained in varied particle sizes and needs to be sifted to use the correct grain size for the polymer blending. The machinery and lumbering equipment in the furniture industry are used to shape wood (Pascal , et al., 2003). The waste obtained from this process is the forest saw dust. Some of the attributes required of the wood sawdust are that it needs to have good absorbing properties, proper chemical reactant, be abrasive, and must act as a décor. During the polymer blending, the physical attributes of the PLA must be adjustable (Achmad, et al., 2014).

Plastic Blend

Most of the food items and other products are being packaged in plastic materials. The plastic materials are non-biodegradable, and in such cases, the wastes destroy the environment by blocking drainages and destroying the city’s aesthetics (Saeed, et al., 2006). There are different classifications of plastics internationally namely,

  • Polypropylene
  • Polyethylene terephthalate
  • Polyvinyl chloride
  • Polyethylene
  • Polystyrene
  • Polycarbonate (Lexan) and many more.

The difference between the different types of plastic is mainly based on the strength and structure of the material which implies its applications. For instance, the food manufacturing industry uses the polypropylene plastics which have high thermal resistance and are clear (Arun, et al., 2017). The material can easily be blended to form other materials such as ropes, electric kettles, and water drinking bottles. PET plastics are generated during the stretching of the polymers in different directions in heated form, and the result solidifies when cooled. PVC is highly undesired as it destroys the environment (Musa, et al., 2015). It finds its application in water and sewage waste pipes and plastic beams. Many researchers have discovered that the recycled plastics and virgin plastics possess the same nature of mechanical properties. These plastics are organic polymers of high molecular mass and contains other substances. Plastics are durable, and they degrade slowly by slowly as the chemical bonds that make the plastics quite resistant to cellulose processes of degradation (Badrina, et al., 2015).

Wood Sawdust And Plastic Blend Compatibilizer

Previously done work and case studies on the polymer blending propose that developing wood sawdust and synthetic blends can be achieved through the use of proper blending agents. According to an experiment carried out by Joyce Koran Teng, the composites are prepared by using coconut oil as the coupling agent, and wood sawdust is implemented as a filler to the already melted plastic. According to this researcher, the physical and mechanical properties of the elements used in blending are investigated such that the experiments are carried out based on particular levels of matter (Irina, et al., 2017). The scanning electron microscopy, SEM, is used to inspect the fractured sample surfaces once the flexural strength tests are carried out. The experiment in this research was carried out such that the ratio of wood sawdust to plastic input was 50:50. The elements were inspected to ensure that they were of good particle size in the range of . For such a plastic blend, the increase in the chemical matter in the mixture helped improve the stiffness of the composites. Adding more wood sawdust or fiber content ensured enhance water absorption rates. The combination was observed to have few or no fiber pullouts and fewer voids. The wood sawdust and plastic blend could find application in the field of construction such that the mix can form partitioning matter for room separation.

To achieve the blend between the recycled or virgin plastics and wood sawdust of the required grain size, one needs to use a compatibilizer to improve the adhesion of the components. The merits associated with the use of compatibilizers is that plastic blends are achieved without altering the essential rheological and mechanical attributes of the virgin plastic. The method of compatibilizers is cost-effective, and the applications of the polymers attained are numerous. Some polymers are formed without the use of anhydride compatibilizer. This research paper seeks to analyze the two cases and determine which is the most effective. When the compatibilizer is used, the maleic anhydride is used for the blending process. It is an organic compound, a product of the oxidation of the benzene aromatic compounds. The maleic anhydride is used in the blending process while it is in its vaporized form. The attributes of the anhydride are summarized as,

Parameter Value
Chemical name  
Density  
Melting point  

The use of the organic compatibilizer necessitates large-scale production. Some of the commodities that are produced are such as the pipes, tanks of different shapes, and automobile fixtures. The anhydride is used in its vapor form hence the appliances made of it tend to be flammable. This research paper recommends that they are used and stored in dry and cold environments. It’s crucial to highlight that the thermoplastics are non-polar while the wood sawdust fibers are polar. The polar substances tend to have an affinity to absorb water and are referred to as hydrophilic materials (Chatree, et al., 2016). For such compounds to be blended the chemical coupling agents are implemented. As a result, it is crucial to ensure the formation of the blend is attained successfully.

Mechanical And Rheological Characteristics