Know these functional groups:

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Presentation transcript:

Know these functional groups: acid, alcohol, amine, amide, epoxide, carbonate, ester

Be able to recognize and differentiate between these polymer structures: polyethylene, polypropylene, polyester, nylon, Kevlar, PVC, silicone, polycarbonate

Oils, elastomers, molding compds - depending on MW Low Tg Stinks when it crosslinks

Rigid Formed by adding plasticizer "vinyl"

Non-crystalline Strong & tough Stiff chains, H bonding betwn chains High TM

Strong, tough Fibers

Nylon cousin Very strong Very stiff chains Fibers

Spaghetti LDPE - low MW, short branches HDPE - higher MW, crystalline (no branches) UHMWPE - very high MW, crystalline

Like an organic salt

Composites Matrix - metallic, ceramic, polymeric Reinforcement - particulates, fibers

Composites Matrix - metallic, ceramic, polymeric Reinforcement - particulates, fibers Fibers - conts, disconts glass, carbon

Composites Role of matrix in FR composites - transfer stress to fibers & protect fibers

Composites Role of matrix in FR composites - transfer stress to fibers & protect fibers Fibers & orientation

Materials selection Economics Environmental Political Market Aesthetics Material properties

Materials selection Economics Environmental Political Market Aesthetics Material properties Ashby diagrams

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