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pvc wear

Comprehensive Analysis

1) "Pvc" -- As to pvc wear PVC Function: abbreviation polyvinyl chloride Pronunciation Symbols Polyvinyl chloride Density 1380 kg/m3 Young's modulus (E) 2900-3400 MPa Tensile strength(σt) 50-80 MPa Elongation @ break 20-40% Notch test 2-5 kJ/m2 Glass temperature 87 °C Melting point 212 °C Vicat B1 85 °C Heat Transfer Coefficient (λ) 0.16 W/m.K Linear Expansion Coefficient (α) 8 10-5 /K Specific heat (c) 0.9 kJ/(kg·K) Water absorption (ASTM) 0.04-0.4 Price 0.5-1.25 €/kg 1 Deformation temperature at 10 kN needle load source: [1] Polyvinyl chloride Polyvinyl chloride, (IUPAC Polychloroethene) commonly abbreviated PVC, is a widely used thermoplastic polymer. In terms of revenue generated, it is one of the most valuable products of the chemical industry. Globally, over 50% of PVC manufactured is used in construction. As a building material, PVC is cheap and easy to assemble. In recent years, PVC has been replacing traditional building materials such as wood, concrete and clay in many areas. Despite appearing to be an ideal building material, concerns were raised about the costs of PVC to the natural environment and human health. There are many uses for PVC. As a hard plastic, it is used as vinyl siding, magnetic stripe cards, window profiles, gramophone records (which is the source of the name for vinyl records), pipe, plumbing and conduit fixtures. The material is often used in Plastic Pressure Pipe Systems for pipelines in the wate..." 2) "Wear" -- As to pvc wear 1wear Pronunciation: 'wer Function: verb Inflected Form(s): wore /'wor/; worn /'worn/; wear·ing Etymology: Middle English weren, from Old English werian; akin to Old Norse verja to clothe, invest, spend, Latin vestis clothing, garment, Greek hennynai to clothe transitive verb 1 : to bear or have on the person <wore a coat> 2 a : to use habitually for clothing, adornment, or assistance <wears a size 10> <wear glasses> b : to carry on the person <wear a sword> 3 a : to hold the rank or dignity or position signified by (an ornament) <wear the royal crown> b : EXHIBIT, PRESENT <wore a happy smile> <commend the book for wearing its research so lightly -- Brad Leithauser> c : to show or fly (a flag or colors) on a ship 4 a : to cause to deteriorate by use b : to impair or diminish by use or attrition : consume or waste gradually <letters on the stone worn away by weathering> 5 : to produce gradually by friction or attrition <wear a hole in the rug> 6 : to exhaust or lessen the strength of : WEARY, FATIGUE 7 : to cause (a ship) to go about with the stern presented to the wind 8 British : to accept or tolerate without complaint : put up with -- usually used in negative constructions <your mates wouldn't wear it -- Colin MacInnes> 9 : TAKE ON 3a intransitive verb 1 a : to endure use : last under use or the passage of time <material that will wear for years> b : to retain quality or vitality <the classics wear well> 2 a : to diminish or decay through use <the Mechanical failure modes Buckling Corrosion Creep Fatigue Fracture Melting Thermal shock Wear In materials science, wear is the erosion of material from a solid surface by the action of another solid. The study of the processes of wear is part of the discipline of tribology. There are four principal wear processes: Surface fatigue : Adhesive wear Abrasive wear Corrosive wear The definition of wear does not include loss of dimension from plastic deformation, although wear has occurred despite no material removal. Also this definition fails to include impact wear where there is no sliding motion or cavitation (also corrosion) where counterbody is a fluid.. Wear can possibly be better defined as a process in which interaction of surface(s) or bounding face(s) of a solid with the working environment results in the dimensional loss of the solid, with or without loss of material. Wear environment includes loads(types include unidirectional sliding,reciprocating, rolling, impact),speed, temperatures, counterbodies(solid, liquid, gas), types of contact (single phase or multiphase in which phases involved can be liquid plus solid particles plus gas bubbles) . In standard wear test (e.g., those formulated by respective subcommittees under ASTM Committee G-2) results, the loss of material during wear is expressed in terms of volume. The volume loss gives a truer picture than weight loss particularly when comparing wear resistance properties of materials with large variations in density. For example, weight loss of WC+Co (density = 14g/cc) as 14g and that of Al alloy (density = 2.7g/cc) as 2.7g shall result in same wear in terms of volume loss of 1cc. For engineering components the working life is over when the dimens..." 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