Ethylene, commonly produced by the cracking of ethane gas, forms the basis for the largest single class of plastics, the polyethylenes. High-density polyethylene (HDPE) is a type of plastic that one can mold into a variety of shapes after heating it to an extremely high temperature. Ethylene, commonly produced by the cracking of ethane gas, forms the basis for the largest single class of plastics, the polyethylenes.... Get a Britannica Premium subscription and gain access to exclusive content. It takes 1.75 kilograms of petroleum (in terms of energy and raw materials) to make one kilogram of HDPE. However, when under the microscope, HDPE’s linear structure means the material has little branching, which offers it stronger intermolecular forces and tensile strength than LDPE. Les structures internes pour l'absorption des chocs sont faites … Ethylene or ethene (IUPAC name) is a hydrocarbon with the formula C 2 H 4. High density polyethylene is a thermoplastic polymer whose monomer unit is ethylene. The main advantages of LLDPE are that the polymerization conditions are less energy-intensive and that the polymer’s properties may be altered by varying the type and amount of its chemical ingredients. Polyethylene (PE), light, versatile synthetic resin made from the polymerization of ethylene. HDPE is commonly recycled, and has the number "2" as its resin identification code. We use high-density polyethylene (HDPE), which is a polymeric model material due to its simple chemical structure and well-known properties [27,28]. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength than LDPE. Internal shock absorbing structures are made of 100% recyclable high-density polyethylene. They are employed in automotive parts, packaging film, footwear, surface coatings, and carpet backing. Ethylene molecules are essentially composed of two methylene units (CH2) linked together by a double bond between the carbon atoms—a structure represented by the formula CH2=CH2. It is sturdy and commonly used in jugs for milk or laundry detergent and bleach bottles. LLDPE is structurally similar to LDPE. This results in a lower tensile strength and increased ductility. High-density polyethylene (HDPE)(0.941

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