Polyether plastics polyphenylene ether

Plastics— Thermoplastic Polyester/Ester and Polyether/Ester Elastomers for Moulding and Extrusion. Part 2 Preparation of Test Specimens and Determination of Properties Plastics—Polyphenylene Ether (PPE) Moulding and Extrusion Materials. Part 1 Designation System and Basis for Specifications Plastics—Polyphenylene Ether (PPE) Moulding and Extrusion Materials. Part 2 Preparation of Test Specimens and Determination of Properties... 

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. 

This survey covers measurements on plastics with all the reinforcing agents previously mentioned and includes a wide range of plastics now being used in plastics technology. It includes commonly used plastics such as polyamides, polyesters, polyethylene terephthalate, and epoxy resins, but also covers newer plastics, such as polyimides, polysulfones, polyethersulfone, polyphenylene sulfide, and polyether ether ketone, all of which have more specialized applications. 

The heat distortion temperature at 1.80 Mpa is the temperature that causes a beam loaded to 1.80 to deflect by 0.3 mm. If the heat distortion temperature is lower than the ambient temperature, -20 C is given. Polymers such as low-density polyethylene, styrene ethylene-butene terpolymer, ethylene-vinyl acetate copolymer, polyurethane, and plasticized polyvinyl chloride distort at temperatures below <50°C, whereas others, such as epoxies, polyether ether ketone, polydiallylphthalate, polydiallyl isophthalate, polycarbonate, alkyd resins, phenol formaldehyde, polymide 6,10 polyimide, poly-etherimides, polyphenylene sulfide, polyethersulfone, polysulfonates, and silicones, have remaikably high distortion temperatures in the range of 150°C to >300 C. Thermomechanical analysis has been used to determine the deflection temperature of polymers and sample loading forces (i.e., plots of temperature vs. flexure). 

Fig. 19.1 The plastics pyramid according to thermal literature data of common polymers preferred materials for HT-PEM applications are in the upper right region TPI thermoplastic polyimide, PES polyether sulfone, P P)SU poly(phenylene)sulfone, PE E)K polyether(ether) ketone, LCP liquid crystal polymer, e.g., Vectra, PPS polyphenylene sulfide, PTEE polytetrafluoroethylene.

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