Polyphenylene sulfide electrical

Common name Polyphenylene sulfide, electrically conductive ... 

Polyphenylene sulfides are good insulators even in a hot environment, with high dielectric resistivities and low or moderate loss factors. Special grades are marketed for electrical applications. 

RYTON Polyphenylene sulfide Physical, Chemical, Thermal, and Electrical Properties, TSM-266, Phillips Chemical Co., Bartlesville, Okla., Apr. 1981, p. 2. 

Coatings. The thermal and chemical resistance of polyphenylene sulfide nas led to a wide variety of applications as a coating material. Examples are cookware with heat-resistant, easy-release coatings containing PPS, valves and fittings coated with PPS for protection against corrosive chemicals, and electrical coils coated with PPS as a temperature-resistant insulation. 

The electrical properties of the three polyphenylene sulfide compounds are given In Table IV. The 40% glass-filled PPS Is the best Insulator as Indicated by the dielectric constant of 3.8. 

Table V Indicates the good retention of electrical properties exhibited by the 40% glass-filled PPS at temperatures up to 147°C. In addition, exposure of test specimens to 50 per cent relative humidity for 5 days did not cause any appreciable change In either dielectric constant or dissipation factor. Thus, environmental factors do not have much effect upon the electrical behavior of polyphenylene sulfide resins.

Electrical properties of polyphenylene sulfide compounds are summarized in Table III. The dielectric constant of 3.1 is low in comparison with many other plastic materials. Similarly, the dissipation factor is very low. Dielectric strength ranges from about 500-600 volts per mil for the various compounds these values are quite high. Thus, both... 

Table III. Electrical Properties of Polyphenylene Sulfide Compounds...

Polyphenylene Sulfide Sulfone - Thermoplastic with good thermal stability, chemical resistance, and dielectric properties, and low flammability and creep. Processed by injection molding. Used in electrical components. Also called polyphenylene sulfide sulfone. 

Polyphenylene sulfides doped with AsFs, I2, or SO3 could also provide electrically conductive materials [11 Id]. 

The electric properties of polyphenylene sulfide and the ability to injection mold very small parts with great precision have led to the use of a variety of connectors, coil forms, etc., in the electronics industry. For example, a pin cushion connector coil terminal support used in color television is now being volume produced from PPS in a multiple unit. 

Furthermore, the electrical properties can be adjusted by varying the matrix polymer and the filler distribution. Since the material concept allows for the use of almost any polymer matrix, the required material properties, for instance a high temperature resistance, can be provided by the use of polyphenylene sulfide (PPS) as a matrix polymer. The morphological structure, and thus the measured conductivity over the thickness, depend on the ratio of the melt temperatures and viscosities of both the polymer and metal alloy, whereas the passage conductivity is at a similarly high level of >4x10 S/m. 

The excellent electrical insulation property of E-glass has found many applications in this field. Fabrics made of textile glass yarn is the backbone of the printed circuit board of the modern electronic industry. Polybutene terephthalate, polyphenylene sulfide, and liquid crystal polymer reinforced with chopped glass fiber are also widely molded into electronic components (23). 

Polyphenylene sulfide (glass fiber reinforced) 91 13.8 0.6 N/A 0.031 Hexural strength, modulus Electrical properties, notched Izod... 

Polyphenylene sulfide Glass fiber Boxes for electronic circuits, relays, circuit breakers, terminal blocks, connectors, electric motor housings... 

Another requirement of a polymer for use in critical applications might be a combination of excellent continuous or maximum operating temperatme (see Table 4.6) and good electrical properties. It is seen in Table 5.8 that polyether ketone, polyphenylene sulfide, and polytetrafluoroethylene all meet the requirements. 

Blown films can be produced from these high molecular weight resins on conventional equipment. These films are transparent and amber as produced. If films are biaxially oriented, this transparency is retained on annealing. At a blow-up ratio of 3.0, the tensile strength and elongations are essentially the same in both the machine and transverse directions (Table V). Electrical properties are typical for polyphenylene sulfide resins. 

Polypyrrole and polythiophene, both first described in 1963 as electrically conducting materials [la], experienced a renaissance when Diaz and Street gave new attention to the electrochemical oxidation of pyrrole [21], and Gamier to the polythiphene field transistor. Polyphenylene vinylene, polyaniline, polyphenylene sulfide, polycarbazole, polyindole, polypyrene and polyene fulvene are just a few of the large number of electrically conducting polymers with specific properties and interest [22]. 

There are other plastics used in addition to those listed in Table (S-14. One example is a polyphenylene sulfide film that is biaxially oriented (BOPPS), with 40 percent crystallinity. It is roughly equivalent to a polyester film in its mechanical properties. This self-extinguishing PPS has a long-term heat resistance per UL 746 B of 160°C (320°F) for mechanical and 180°C (356°F) for electrical resistance. 

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