polymerdatafiles(编辑修改稿)

polymerdatafiles(编辑修改稿)内容摘要：

s. Low mechanical strength. Expensive. Nonstick coatings. gaskets, packings, bearings, high and low temperature electrical and medical products, other applications needing excellent dielectric strength, chemical, and temperature resistance. PU Polyurethane Thermoplastic Properties Applications Flexible, clear, highly elastic with high impact resistance, dielectric strength, chemical resistance, and abrasion resistance. It can be made into films, solid mouldings, or flexible foams. Outdoor exposure turns brittle. Soles and heels for sports shoes, automotive structural members, puter housings, furniture, seals and gaskets, skateboard wheels and packaging foams. PVC Polyvinyl chloride More Information Thermoplastic Properties Applications PVC is one of the most versatile of all polymers. The polymer cannot be used in the natural state but pounding can create an enormous range of properties from rigid products (window frames) through to flexible sheets and hoses. Flexible grades are easy to process. Rigid grades have a high dielectric strength, outdoor stability, chemical resistance, good moisture stability, and low cost. Material has low heat resistance. Pipes and fittings, wire and cable insulation, window profiles, extruded film and sheet, and medical applications. SI Silicone Thermoset Properties Applications Possesses dimensional stability and good electrical and dielectrical properties over wide frequency and temperature ranges. It has flame resistance, low water absorption, moderate thermal shock resistance, and average polymeric mechanical properties. It has a high cost, limited shelflife, and a long curing time. Computer chips, IC, cooking ware, and food containers, high performance window seals. SAN Styrene Acrylonitrile Thermoplastic Properties Applications Rigid, transparent and tough, resistant to stress cracking and crazing. Last edited: 169。 Tangram Technology Ltd. 2020 Our standard disclaimer regarding Inter data applies. Polymer Data File: Acrylonitrile Butadiene Styrene ABS Introduction Advantages and Limitations Typical Applications Processing Physical and Mechanical Properties Finishing Thermal, Electrical and Optical Properties Health and Safety Chemical Resistance Properties Other Information Introduction ABS (Acrylonitrile butadiene styrene terpolymer) is a member of the styrene family of polymers and shares many properties with the PS type of polymer. The actual properties of a particular ABS material depend on the blend ratio of the three major constituents (Acrylonitrile, butadiene and styrene). The material properties can be tailored to give specific desired properties: the acrylonitrile ponent gives chemical resistance and heat stability, the butadiene gives toughness and impact strength and the styrene gives rigidity and processability. Varying the ABS ratios will change the properties significantly and the number of grades available is almost limitless. The ABS material itself can also be 39。 alloyed39。 with other materials such as PC, PMMA, PBT, PA and even PVC. This creates an even greater choice of properties and processing opportunities and many ABS materials are created for a single application (mainly automotive). The material can be readily processed by most of the mon processing methods. Typical Applications Mechanical: Office machine housings that are colour fast and fire retardent, pipes and fittings. Consumer goods: Food containers, luggage shells, household equipment such as vacuum cleaners and hair driers, vacuum formed refrigerator liners, internal trays for refrigerators, telephone handsets. Automotive: Safety helmets, electroplating possibilities give applications in fascia panels, body fittings, instrument clusters and radiator grilles. ABS is effectively the 39。 material of choice39。 for automotive interior applications. Electrical: Computer housings and fascias. Miscellaneous: Dinghy hulls thermoformed from sheets give stiff, impact resistant hull that is unaffected by sea water. Plumbing fittings when electroplated. Physical and Mechanical Properties ABS is hard and tough even at temperatures as low as 40oC. It has a high resistance to temperature fluctuations but has very limited weathering resistance and the mechanical properties tend to degrade quickly in outdoor exposure. It has low water absorption. Property Approximate Value ABS Tensile strength 55 80 MN/m2 Tensile Modulus 2 3 GN/m2 Elongation at Break 10 50 % Flexural Strength 50 150 MN/m2 Notched Impact Strength 10 20 kJ/m2 Specific Heat kJ/kgoC Glass Transition Temperature 110 oC Heat Deflection Temperature 100oC Coefficient of Thermal Expansion 5 10 x 105 / oC Long Term Service Temperature 100 oC Specific Gravity Mould Shrinkage m/m Water Absorption % (50% rh) Transparency Opaque Thermal, Electrical and Optical Properties Thermal properties ABS has good high temperature performance and the softening point is generally higher than standard PS. The heat deflection temperature can be increased by several methods to between 120 to 130oC. ABS can be used down to about 40oC. Fire behaviour Most ABS variants are flammable and will burn freely (giving off typical styrene odours). The flame and fire properties of ABS can be improved by blending bromine pounds at 15 20 pts phr an expensive solution that seriously promises the toughness of the material. Another method is to create an ABS/PVC blend and to let the chlorine on the PVC act as a fire retardent. Electrical properties ABS has relatively good electrical insulating properties and products are suitable for。