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Polymers
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Polymers. Prof. David Roylance Department of Materials Science and Engineering. Advice to Benjamin Braddock, 1967: “I’ve got one word for you, my boy: …”. MIT/DMSE. Plastics, my boy. MIT/DMSE. MIT/DMSE. Some polymer history – ca 1492 Columbus (Priestly ca 1800)
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Polymers
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Polymers Prof. David Roylance Department of Materials Science and Engineering Advice to Benjamin Braddock, 1967: “I’ve got one word for you, my boy: …” MIT/DMSE
Plastics, my boy ... MIT/DMSE
Some polymer history – • ca 1492 Columbus (Priestly ca 1800) • ca 1839 Goodyear/Hancock • ca 1930 Staudinger/Carouthers • ca 1953 Watson/Crick • ca 1955 Ziegler/Natta • ca 1970 Kwolek MIT/DMSE
The Polymeric Solid State Semicrystalline microstructure Blow-molded HDPE milk bottle (recyclable) Covalently-bonded long-chain hydrocarbon MIT/DMSE
Stiffness vs. Temperature MIT/DMSE
Molecular Orientation and Strength MIT/DMSE
Polyamides Carouthers: nylon 66 Kwolek: aramid MIT/DMSE
Kevlar Fibers – a polyaramid MIT/DMSE
Modern Lightweight Personnel Armor MIT/DMSE
Panel and Bullet After Impact MIT/DMSE
Vs-Vr Plot – Kevlar 29, Single Layer MIT/DMSE