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HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [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 (38 MPa versus 21 MPa) than LDPE. [6]
Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane. [12] [a] [13] [b] When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white, waxy substance that he had created, they recognized that it contained long −CH 2 − chains and termed it polymethylene.
Materials Science and Engineering: A — Structural Materials: Properties, Microstructure and Processing is a peer-reviewed scientific journal.It is the section of Materials Science and Engineering dedicated to "theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating ...
Journal of Engineering for Gas Turbines and Power: J. Eng. Gas Turbines Power: 1959-present ISSN 0742-4795 (print) ISSN 1528-8919 (web) Journal of Engineering for Industry: J. Eng. Ind. 1959-1996 [note 3] ISSN 0022-0817 (print) ISSN 2161-9433 (web) Journal of Engineering for Sustainable Buildings and Cities: J. Eng. Sustain. Build. Cities: 2020 ...
The Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science is a peer-reviewed scientific journal that covers the fundamentals of engineering science and its application to the solution of challenges and problems in engineering. The journal obtained its current name in 1989 when it was split off ...
Linear low-density polyethylene (LLDPE) is a substantially linear polymer (polyethylene), with significant numbers of short branches, commonly made by copolymerization of ethylene with longer-chain olefins.
Medium-density polyethylene (MDPE) is a type of polyethylene defined by a density range of 0.926–0.940 g/cm 3. [1] It is less dense than HDPE, which is more common. MDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts. MDPE has good shock and drop resistance properties.
Modelling and Simulation in Materials Science and Engineering is a peer-reviewed scientific journal published by the IOP Publishing eight times per year. The journal covers computational materials science including properties, structure, and behavior of all classes of materials at scales from the atomic to the macroscopic. This includes ...