Volume 4 - Loctite.ph

Polyphenylene Sulfide (PPS)ThermoplasticTrade Names Manufacturer• FortronHoechst Celanese• HyvexFerro Corporation• RytonPhillips 66 Co.• SupecGE Plastics• TedurMiles Inc.Typical Properties of Polyphenylene Sulfide (PPS)American EngineeringSIProcessing Temperature 600°F to 650°F 316°C to 343°CLinear Mold Shrinkage 0.001 to 0.003 in./in. 0.001 to 0.003 cm/cmMelting Point 525°F to 600°F 274°C to 316°CGeneral DescriptionPPS is produced by reacting p-dichlorobenzene with sodium sulfide.The resulting polymer is a crystalline, aromatic polymer whosebackbone is composed of benzene rings para-substituted with sulfuratoms. This molecular structure is highly crystalline and extremelystable, which results in the outstanding heat resistance, chemicalresistance, and dimensional stability of PPS. Specialty grades availableinclude ground and fibrous glass, mineral, and carbon filled. In 2004,the price of PPS ranged approximately from $3.00 to $6.00 per poundat truckload quantities.General PropertiesThe most notable properties of PPS are its thermal stability, inherentflame resistance, and outstanding chemical resistance. PPS also hasgood mechanical properties which remain stable during both longand short-term exposure to high temperatures. Although the hightensile strength and flexural modulus associated with PPS decreasesomewhat with increasing temperature, they level off at approximately250°F (121°C), and moderately high mechanical properties aremaintained up to 500°F (260°C). In addition, PPS also exhibits asignificant increase in its elongation and toughness at elevatedtemperatures. Although PPS has a low impact strength, glass fiberscan be added for applications requiring high impact strength anddielectric properties. Glass and mineral fillers are also used forelectrical applications where a high arc resistance and low track rateare required. Although PPS is highly chemically resistant – virtuallyinsoluble below 400°F (204°C) – it can be attacked by chlorinatedhydrocarbons. PPS is difficult to process, because of the high melttemperatures required, but the extremely crystalline structureof PPS results in high quality molded parts which are uniformand reproducible.Density 81.2 to 124.9 lb./ft. 3 1.30 to 2.00 g/cm 3Tensile Strength, Yield 1.4 to 29.0 lb./in. 2 x 10 3 1.0 to 20.4 kg/cm 2 x 10 2Tensile Strength, Break 6.4 to 29.0 lb./in. 2 x 10 3 4.5 to 20.4 kg/cm 2 x 10 2Elongation, Break 1.0 to 4.0% 1.0 to 4.0%Tensile Modulus 10.0 to 45.0 lb./in. 2 x 10 5 7.0 to 31.6 kg/cm 2 x 10 4Flexural Strength, Yield 6.0 to 40.0 lb./in. 2 x 10 3 4.2 to 28.1 kg/cm 2 x 10 2Flexural Modulus 1.2 to 2.4 lb./in. 2 x 10 5 0.8 to 16.9 kg/cm 2 x 10 4Compressive Strength 16.0 to 28.0 lb./in. 2 x 10 3 11.2 to 19.7 kg/cm 2 x 10 2Izod Notched, R.T. 0.6 to 1.9 ft.-lb./in. 3.2 to 10.3 kg cm/cmHardness R116 - R123 Rockwell R116 - R123 RockwellThermal Conductivity 2.01 to 2.22 BTU-in./hr.-ft. 2 -°F 0.29 to 0.32 W/m-°KLinear ThermalExpansionDeflection Temperature@ 264 psiDeflection Temperature@ 66 psiContinuousService Temperature0.5 to 1.8 in./in.-°F x 10 -5 0.9 to 3.2 cm/cm-°C x10 -5300°F to 550°F 149°C to 288°C400°F to 550°F 204°C to 288°C300°F to 450°F 149°C to 232°CDielectric Strength 280 to 510 V/10 -3 in. 1.1 to 2.0 V/mm x 10 4Dielectric Constant@ 1 MHzDissipation Factor@ 1 MHzWater Absorption,24 hr.3.4 to 6.0 3.4 to 6.00.003 to 0.010 0.003 to 0.0100.010 to 0.060% 0.010 to 0.060%Typical Applications• Chemical – Submersible, centrifugal, vane andgear-type processing pumps• Mechanical – Hydraulic components, bearings, cams, valves• Small Appliance – Hair dryers, small cooking appliances,range components60The Loctite ® Design Guide for Bonding Plastics, Volume 4