Engineering thermoplastics polyether sulfones

Polyether sulfones (PES) are another class of engineering thermoplastics generally used for objects that require continuous use of temperatures around 200°C. They can also be used at low temperatures with no change in their physical properties. 

Various kinds of engineering thermoplastics such as polyether sulfone, polyether imide, polyaryl ether ketone, and polyphenylene oxide have been studied as toughening agents for... 

An alternative approach to using a rubber such as CTBN as the disperse phase is to use an engineering thermoplastic such as polyether sulfone or a polyimide in which the mechanical properties and Tg are more closely matched to those of the resin. These systems exhibit LCST behaviour, so the cure tempemture is located below the initial miscibility gap... 

Polyether sulfone is a high-temperature engineering thermoplastic with the combined characteristics of high thermal stability and mechanical strength. It is a linear polymer with the following structure ... 

High performance engineering thermoplastics have recently assumed increasing importance due to their exceptional properties at elevated temperatures. A number of such specialty polymers have been introduced into the market for high temperature applications and examples of some of the outstanding ones are polyphenylene oxide (PPO), polyphenylene sulfide (PPS), polyether sulfone (PES), polyaryl sulfone (PAS), polyether ketone (PEEK), polyether imide (PEI) and polyarylate (PAr). 

Polyether sulfone (PES) and polyaryl sulfone (PAS) comprise a class of engineering thermoplastics with high thermal, oxidative, and hydrolytic stability and a good resistance to aqueous mineral acids, alkali, salt solutions, oils and greases, whereas polyether ether ketone (PEEK) has attractive properties like good abrasion resistance, low flammability and emission of smoke and toxic... 

Fortunately, the deficiencies of both the classic thermosets and general purpose thermoplastics have been overcome by the commercialization of a series of engineering plastics including polyacetals, polyamides, polycarbonate, polyphenylene oxide, polyaryl esters, polyaryl sulfones, polyphenylene sulfide, polyether ether ketones and polylmides. Many improvements in performance and processing of these new polymers may be anticipated through copolymerization, blending and the use of reinforcements. 

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