List of Articles پلاستیک

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  seyed hamid salimi
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  hoori mivechi
  20.1001.1.25383345.1400.6.21.7.5
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  Amirhosein Yazdanbakhsh
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  4 - A Review On Biodegradable Mealworms Mechanism
  SeyedAmirHossein  Mousavi Aghabagher reza jahan mardi
  Every year, an enormous amount of 2.5 million tons of plastic enter the oceans. On land, plastic also accumulates in landfills, beaches and other sensitive ecosystems around the world which has been a huge concern through the years. Recent research has been conducted to More

  Every year, an enormous amount of 2.5 million tons of plastic enter the oceans. On land, plastic also accumulates in landfills, beaches and other sensitive ecosystems around the world which has been a huge concern through the years. Recent research has been conducted to show us that one type of worm may help us solve the huge problem of plastic waste. Scientists have discovered that the larvae of a type of worm, Mealworm called Tenebrio Molitor, can include styrofoam and other polystyrenes as well as polyethylene in their diet. Not only do worms go on a styrofoam diet, they say, but the microorganisms in their gut can break down plastics during their digestive process, turning it into carbon dioxide and eventually use it as the nutrients that their bodies need. Biodegradable materials disposed by worms also seem to be used as fertilizer to fertilize and impregnate agricultural soil. We are looking for solutions to implement this discovery in a way that eliminates plastic waste therefore can be a solution to clearer oceans, rivers and the entire environment from the inevitable consequences of plastic accumulation. In this review study, narrations from articles related to the biodegradation of polyethylene, polystyrene and polypropylene have been reviewed. Manuscript profile
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  5 - The effect of additives and masterbatch to improve the properties of recycled polyolefins
  Hamidreza Haydari marziyeh hosseini
  Although the recycling of polymer products is beneficial for the environment and economy, the main goal is to achieve the efficiency of raw (intact) polymers in recycled polymers. The best type of recycling to have maximum energy efficiency and minimum environmental con More

  Although the recycling of polymer products is beneficial for the environment and economy, the main goal is to achieve the efficiency of raw (intact) polymers in recycled polymers. The best type of recycling to have maximum energy efficiency and minimum environmental consequences is mechanical recycling. However, there are a number of differences between virgin and recycled polymers. Due to the structural changes and the presence of impurities in the polymer, it is difficult to achieve a quality recycling. Whether the recycled polymer is suitable for obtaining new applications or not is measured by mechanical tests (such as tensile test, impact test), physical tests (such as hydraulic stability, surface roughness) and operational tests (extrusion and molding) under standard conditions. When these tests are performed, most recycled polymers do not meet the requirements required for various applications, unless we use additives that improve their properties. These additives may include coupling agents, impact improvers, metal deactivators, melt flow regulators, antioxidants, masterbatches, etc., and each is used in some way to improve specific properties of the polymers. Although the recycling of polymer products is beneficial for the environment and economy, the main goal is to achieve the efficiency of raw (intact) polymers in recycled polymers. Manuscript profile
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  6 - A review of factors influencing the rheological behavior of highly filled composite
  Ali Riazati
  The highly filled composite consists of two polymer matrix components and different fillers with a weight fraction of more than 30% and are widely used in defense systems and aerospace engines. Each of the metal powders can affect the rheological behavior of highly fill More

  The highly filled composite consists of two polymer matrix components and different fillers with a weight fraction of more than 30% and are widely used in defense systems and aerospace engines. Each of the metal powders can affect the rheological behavior of highly filled composites according to their properties, type of granulation, type of particle size, and morphology. The investigation of three types of metal powders, aluminum, magnesium and boron, which are the most used in highly filled composites, has been done in this study. The results of the investigation of the rheological behavior showed that with the increase in the size of solid particles, the content of metal powders, as well as the cross-linking factor, the viscosity and yield stress of the slurry of composite materials increases and causes the flow properties of the slurry to deteriorate and its service life to be shortened. become wet The increase in viscosity is due to smaller solid particles and the increase in molecular weight and the formation of transverse connections in the structure of the prepolymer. The viscosity of the slurry of composite materials decreases with the increase of the shearing speed and shows non-Newtonian pseudo-plastic behavior, and its value depends on the speed and time of the applied shearing force. Combining boron metal powder with magnesium or aluminum powder can greatly improve the rheological behavior of the highly filled composite. Manuscript profile