• Toughness: The energy needed to break a unit volume of material. in Audi A6 there is represented mass percentage contribution of polymer materials nearly 14 % on the present. PHYSICAL AND MECHANICAL PROPERTIES OF MATERIALS Melting temperature 9 Density 10 Young’s modulus 11 Yield stress and tensile strength 12 2. environment. Polymers, derived from the Greek term for “many parts,” are large molecules comprised of many repeat units that have been chemically bonded into long chains. The plastic properties on pages 222/223 are exclusively applicable for the specified standard test pieces. The plastic and packaging material used by OKW are on the whole harmless and, apart from some exceptions, can easily be recycled and reutilized. TYPICAL PROPERTIES of PVC and CPVC ASTM or UL test Property PVC CPVC PHYSICAL D792 Density (lb/in³) (g/cm³) 0.051 1.41 0.055 1.52 D570 Water Absorption, 24 hrs (%) 0 0.04 MECHANICAL D638 Tensile Strength (psi) 7,500 8,200 D638 Tensile Modulus (psi) 411,000 430,000 D638 Tensile Elongation at Break (%) - 27 • Liquid plastics used to make reinforced plastic parts (composite materials) Hardness: a measure of the resistance of a material to plastic (permanent) deformation Measured by indentation • indenter material (ball, pyramid, cone) is harder than the material being tested (i.e. Variations may occur as far as cases and technical parts are concerned. • Plastic behavior: This permanent deformation behavior occurs when the tensile (or compressive) uniaxial stress reaches y. Material Properties 45 An additional objective of this Chapter is the presentation of values for the major properties that are used for material classification and piping design, and a brief description of the methods based on which these properties are determined. Mixing aspects There are common a lot of factors influence the final properties of article in … affect material properties. The properties of engineering materials can be classified into the following main groups: physical and chemical. 6 PlaSticS: originS anD DefinitionS To understand plastic materials, you should have some insight into polymers, the building blocks of plastics. • Plastics melt or cure at relative low temperatures • Plastics require less energy to process than metals • Raw materials most commonly are pellets, powders • Also available as sheet, plate, rod, and tubing (produced by extrusion, etc.) The physical properties can also be further grouped into categories: mechanical, thermal, electrical, magnetic, optical etc. Plastic, polymeric material that has the capability of being molded or shaped. • Ductility: The plastic strain at … The interest in po lymer materials and its applicat ion rising, e.g. Silk, cotton, : tungsten carbide, diamond) • indenter is pressed at 90o • hardness is based on the depth of the impression or its cross-sectional area This property of plasticity, often found in combination with other special properties such as low density, low electrical conductivity, transparency, and toughness, allows plastics to … Dislocations and plastic flow 5 Fast fracture 6 Statistics of fracture 6 Fatigue 7 Creep 7 Diffusion 8 Heat flow 8 II. 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