Transcription of Engineering Properties of Polyethylene
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Engineering Properties of Polyethylene
1 AWWA MANUALM55 Chapter1 Engineering Properties of PolyethyleneINTRODUCTIONA fundamental understanding of material characteristics is an inherent part of thedesign process for any piping system. With such an understanding, the pipingdesigner can use the Properties of the material to design for optimum chapter provides basic information that should assist the reader in understandinghow Polyethylene s (PE s) material characteristics influence its Engineering is a thermoplastic, which means that it is a polymeric material that can be soft-ened and formed into useful shapes by the application of heat and pressure and whichhardens when cooled. PE is a member of the polyolefins family, which also includespolypropylene. As a group of materials, the polyolefins generally possess low waterabsorption, moderate to low gas permeability, good toughness and flexibility at lowtemperatures, and a relatively low heat resistance.
temperatures, and a relatively low heat resist ance. PE plastics form flexible but tough products and possess excellent resistance to many chemicals. POLYMER CHARACTERISTICS In general terms, the performance capability of PE in piping applications is deter-mined by three main parameters: density, molecular weight, and molecular weight distribution.
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