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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]
Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... ( mg / kg ) Price [7] Year Source Notes USD/kg USD/L [c] 1: H: Hydrogen ...
As of 2017, over 100 million tonnes of polyethylene resins are being produced annually, accounting for 34% of the total plastics market. [ 8 ] [ 9 ] Many kinds of polyethylene are known, with most having the chemical formula (C 2 H 4 ) n .
High performance plastics are relatively expensive: The price per kilogram may be between $5 and $100 . The average value is slightly less than 15 US-Dollar/kg. [ 5 ] High-performance plastics are thus about 3 to 20 times as expensive as engineering plastics. [ 2 ]
10–50 kg/mol, varies Density: 1. ... is the most common thermoplastic polymer resin of the polyester family and is used in fibres for ... (10–20 parts per billion ...
These molecules are several orders of magnitude longer than those of familiar high-density polyethylene (HDPE) due to a synthesis process based on metallocene catalysts, resulting in UHMWPE molecules typically having 100,000 to 250,000 monomer units per molecule each compared to HDPE's 700 to 1,800 monomers.
Commodity plastics or commodity polymers are plastics produced in high volumes for applications such as packaging, food containers, and household products, ...
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.