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Polyether ether ketone (PEEK) is a colourless organic thermoplastic polymer in the polyaryletherketone (PAEK) family, used in engineering applications. It was invented in November 1978 [2] and brought to market in the early 1980s by part of Imperial Chemical Industries (ICI), the PEEK division was acquired through a management buyout, giving rise to Victrex PLC.
Polyetherketones (PEK for short) are polymers whose molecular backbone contain alternating ketone (R-CO-R) and Ether (R-O-R) functionalities. The most common are Polyaryletherketones (PAEK), in which there is an aryl group linked in the (1–4)-position between each of the functional groups.
A successor company to Janentzky & Weber Manufacturers & Importers, F. Weber & Company, Inc. was established in 1853, [4] and has been known for quality and innovation throughout its history, for example in the late 19th and early 20th centuries—the golden years of the prestigious World Fair—F. Weber & Co. frequently won gold medals for its fine quality products.
PAEK plastics are characterized by phenylene rings that are linked via oxygen bridges (ether and carbonyl groups ()).The ratio and sequence of ether to ketones mainly affects the glass transition temperature and melting point of the polymer.
In 1985, the Kaufmans sold the 2,000-acre (8.1 km 2) quarry to investors who filled in and developed the quarry for residential use, including Marble Cliff Commons [6] [2] [3] apartments and Marble Cliff Crossing, a 100 single-family and 60 double-family subdivision built between 1998 and 2003. [7]
Instead of having only one room reserved exclusively for teens at the North Columbus branch, the $2.5 million Flournoy Center will have 7,000 square feet of space dedicated to their fun and future.
Additionally, it provides services for manufacturing and product development, such as custom material formulations, composite mold construction, design for manufacturability and so on. [1] [6] [7] Next Generation Product Released: Core Molding Technologies' Featherlite® SMC Production Reaches 10,000,000 lbs. [8]
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]
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