MATERIAL CHARACTERISATION OF POLYETHYLENE AND POLYSTYRENE PART 1 1. What date was the video taken? = 21/10/2010 2. What is the initial thickness of the callipers as first shown?= 6490mm 3. What is the time on the when last sample breaks ( ±5 s)? = 2.55 s Abstract Polystyrene is hard but brittle thermoplastic‚ less flexible and ductile at room temperature than Polyethylene because the phenyl group in its repeating unit increases the strength of intermolecular forces present in crystalline due
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History Polyethylene was first synthesized by the German chemist Hans von Pechmann who prepared it by accident in 1898 while heating diazomethane. When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white‚ waxy‚ substance that he had created they recognized that it contained long -CH2- chains and termed it polymethylene. The first industrially practical polyethylene synthesis was discovered (again by accident) in 1933 by Eric Fawcett and Reginald Gibson at the ICI
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Theory. Polyethylene Polyethyene is a type of polymer that is used in our daily life. Polyethylene(abbreviated PE) is a thermoplastic polymer‚ meaning that is can be melted to a liquid state and remolded as it returns to a solid state. PE is chemically synthesized from ethylene‚ a compound that is usually made from petroleum or natural gas[1]. The main mechanical properties of PE are the ultimate tensile strength and the modulus of elasticity. There are different types of Polyethylene‚ which
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The characteristic properties of slime can be explained by polymerisation reactions. Polymers can be explained most simply by the polymerisation of the molecule ethylene into polyethylene (see figure 1 below). Figure 1. Polymerisation of polyethylene from ethylene. In this example‚ the double bond between the carbon atoms is broken‚ allowing each carbon atom to form one more bond between another molecule. The double bond between the carbon atoms is weaker because the type of orbital is ‚ compared
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Global Polyethylene Market 2014-2018 Polyethylene is also known as polythene and is the most commonly used plastic. It is chemically synthesized from ethylene. Polyethylene is used in various products as it can be easily remolded. It is used in packaging‚ pond liners‚ pipes‚ molds‚ wires‚ and cables‚ general purpose tubing‚ drums‚ carrier bags‚ and household goods. There are three major types of polyethylene: HDPE‚ LDPE‚ and LLDPE. Covered in this Report This report covers the present
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This is a professional and in-depth study on the current state of the Oxidized Polyethylene Wax(OPE Wax) industry in Global and China. The report provides a basic overview of the industry including definitions‚ applications and industry chain structure. Global market analysis and Chinese domestic market analysis are provided with a focus on history‚ developments‚ trends and competitive landscape of the market. A comparison between the international and Chinese situation is also offered. The also
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com/Market-Reports/alpha-olefin-market-1282.html Early buyers will receive 10% customization on reports. The alpha olefin market is mainly driven by polyethylene application‚ which accounts for the largest consumption share of alpha olefins. Rising demand for co-monomers in the production of polyethylene and poly alpha olefins (used in synthetic lubricants) is driving the alpha olefin market. Along with polyethylene and poly alpha olefins (PAO)‚ oil field drilling is also a growing application. The alpha olefin players are constantly
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Effect of Temperature on Polymers: Solids on heating eventually melt to form a liquid. With polymers it is not so simple rubber on cooling (in liquid nitrogen) becomes brittle or glassy. Many polymers have a mixture of ordered (crystalline) regions and random (amorphous) regions. In the glassy state‚ the tangled chains in the amorphous region are frozen so movement of chains is not possible the polymer is brittle. If the glassy material is heated‚ the chains reach a temperature at which they
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polymers: polyethylene‚ polypropylene‚ polystyrene‚ polycarbonate‚ poly(vinyl chloride). These are all extremely common‚ and have widespread applications in industry. Each of these polymers exhibits properties which allow it to be of unique technological importance. Theoretical values for the properties utilized in determining the identity of the unknown sample are listed in Table 1. Density (g/cm3) Molecular Weight (g/mol) Melting Point (ºC) Polypropylene 0.905 42.08 170 Polyethylene 0.92
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trophic levels. • Polythene obstructs the drains‚ natural water bodies‚ landfills. • Plastic bags may be carried by the wind into forests‚ ponds‚ rivers‚ and lakes polluting te surrounding regions • Most facial cleansers are made of polyethylene microplastics which are too small to be removed by wastewater plants and therefore easily get entry into into waterways and ocean.Additionally these microplastics in presence of UV ray can absorb PCBs (polychlorinated biphenyls) causing a greater
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