- published: 04 Nov 2011
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Polysulfones are a family of thermoplastic polymers. These polymers are known for their toughness and stability at high temperatures. They contain the subunit aryl-SO2-aryl, the defining feature of which is the sulfone group. Polysulfones were introduced in 1965 by Union Carbide. Due to the high cost of raw materials and processing, polysulfones are used in specialty applications and often are a superior replacement for polycarbonates.
A typical polysulfone is produced by the reaction of a diphenol and bis(4-chlorophenyl)sulfone, forming a polyether by elimination of sodium chloride:
The diphenol is typically bisphenol-A or 1,4-dihydroxybenzene. Such step polymerizations require highly pure monomer to ensure high molecular weight products.
These polymers are rigid, high-strength, and transparent, retaining these properties between −100 °C and 150 °C. It has very high dimensional stability; the size change when exposed to boiling water or 150 °C air or steam generally falls below 0.1%. Its glass transition temperature is 185 °C.
Modified Polyethersulfone (mPES) is an advanced hydrophilic membrane filtration chemistry that provides higher flux rates for faster processing times, excellent selectivity for separation applications, and low protein binding for higher product yields than other membranes. For more information visit: www.spectrumlabs.com
What does polyethersulfone mean? A spoken definition of polyethersulfone. Intro Sound: Typewriter - Tamskp Licensed under CC:BA 3.0 Outro Music: Groove Groove - Kevin MacLeod (incompetech.com) Licensed under CC:BA 3.0 Intro/Outro Photo: The best days are not planned - Marcus Hansson Licensed under CC-BY-2.0 Book Image: Open Book template PSD - DougitDesign Licensed under CC:BA 3.0 Text derived from: http://en.wiktionary.org/wiki/polyethersulfone Text to Speech powered by TTS-API.COM
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An Illustrative Video that was done in cooperation with "The American University in Cairo", which states the efficiency of carbon nano-tube membranes in water filtration process and desalination, giving a glimpse of CNT preparation process.