Polyarylsulfone thermoplastic

The polyarylsulfone thermoplastic exhibits essentially the same heat resistance of the polyarylstdfone based on bis-(4-chlorophenyl)sulfone and 2,2-bis(4-hydroxyphenyl)pro-pane, along with the added plus of a lower melt viscosity at equivalent processing temperatures. The flow improvement is demonstrated by comparison with Brabender data, injection-molding conditions, and melt-viscosity data. 

Jn recent years, there has been a considerable amount of interest in high-molecular-weight polyarylsulfone polymers (1-3). These polymeric materials possess heat-deflection temperatures of 165°-260°C plus excellent thermal stability at the high processing temperatures required. This paper deals with the synthesis and the physical and mechanical properties of a new heat-resistant polyarylsulfone. This new polyarylsulfone thermoplastic exhibits a significant reduction in apparent (melt) viscosity with only a slight reduction in heat deflection temperature when compared with the polyarylsulfone based on bis(4-chlorophenyl)sulfone and 2,2-bis (4-hydroxyphenyl) propane. 

Amorphous Thermoplastics. Polysulfone, polyethersulfone, and polyarylsulfone are examples of amorphous thermoplastics. These materials have high Ts and can stand temperatures up to 200°C for a long period of time. Amoco and ICI are principal suppHers of this class of material. 

Polyarylsulfones are a class of high-use temperature thermoplastics that characteristically exhibit excellent thermal-oxidative resistance, good solvent resistance, hydrolytic stability, and creep resistance (10). In 1965, Union Carbide announced a thermoplastic polysulfone based on dichlorodiphenylsulfone and bisphenol A (11). This polysulfone became commercially available in 1966 and was designated as Udel polysulfone. Since 1966, Imperial Chemical Industry (ICI), Minnesota Mining and Manufacturing (3-M), and Union Carbide have commercialized polyarylsulfones that contain only aromatic moieties in the polymer structure. These materials have been designated Vlctrex polyethersulfone (ICI), Astrel 360 (3-M), and Radel polyphenylsulfone (Union Carbide). 

Polyetheretherketone thermoplastic, engineering automotive components Polyphenylene ether thermoplastic, engineering aviation Polyarylsulfone resin... 

Polyarylsulfone resin thermoplastic, engineering electronic Polyarylsulfone resin thermoplastic, engineering extrusion Polyphenylene ether... 

Polyarylsulfone (PAS) thermoplastics have relatively low melt-processing temperatures, considering their high mechanical properties. For one thing, they are hydrolytically stable. They have a heat-distortion temperature at least 204°C (400 F) at 1,820 kPa (264 psi), tensile strengths to 124 MPa (18,000 psi) or better, and a flexural modulus up to 1.17 X 10 psi. Under stress they are highly resistant to mineral acids and alkali and salt solutions. Their applications are in electrical and electronic items, frozen-food packaging, and aircraft interiors. 

Polyamide-imides Polyarylsulfones (PAS) Polybutylenes (PB) Polycarbonates (PC) Polyesters (thermoplastic) Polyesters (thermoset-glass fiber filled)... 

Polyarylsulfones are a class of high-use temperature thermoplastics that characteristically exhibit excellent thermal-oxidative resistance, good solvent resistance, hydrolytic stability, and creep resistance [23,24]. Routes to polysulfones were discovered independently and almost simultaneously in the laboratories of Union Carbide Corporation, ICI, and 3M Corporation. 

The heating element is sandwiched between the parts to be joined, referred to as the adherends. Thermoplastic materials used include neat thermoplastics and composites such as carbon fibers in a PEEK, polyarylsulfone (PAS), or polyetherimide (PEI) matrix. An interlayer thermoplastic material melts or softens below the melting point of the adherend, so that adherend degradation is minimized and mechanical performance of the joint is maintained. Insulators on the outermost ends of the weld stack complete the assembly. The weld stack can be autoclaved for consolidation. [ 9]-[94]... 

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