S2polymers - No recycling, permanent, covalent bonds and...

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Two polymeric material: plastics and elastomers Polymers of chains of hydrocarbons, non-crystalline Backbones are not always straight causing to change properties Most exhibit isotropic characteristics
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Plastic can be divided into Thermoplastic Require heat to make them formable and after cooling, retain the shape they were formed into. They also have secondary bonds High density polyethylene and have secondary bonds which are weak and melts Thermosetting or thermosets Forms into permanent shape and cured or set by a chemical reaction
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Unformatted text preview: No recycling, permanent, covalent bonds and are strong, doesn ’ t melt like epoxy High thermal stability, rigidity, dimensional stability, resistance to creep and deformation, light weight, high electrical and thermal insulating properties Intra-molecular covalent bonds have C backbone Intermolecular bonding depends on the joining of molecular chains Linear or branched are secondary branches and cross-linked are primary bonds Weakly linked are elastomers and strongly linked are thermosets...
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This note was uploaded on 09/25/2010 for the course MATE 210 taught by Professor Gary during the Spring '10 term at Aarhus Universitet.

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S2polymers - No recycling, permanent, covalent bonds and...

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