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Polymers

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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  1. 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

  2. Plastics, my boy ... MIT/DMSE

  3. MIT/DMSE

  4. 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

  5. The Polymeric Solid State Semicrystalline microstructure Blow-molded HDPE milk bottle (recyclable) Covalently-bonded long-chain hydrocarbon MIT/DMSE

  6. Stiffness vs. Temperature MIT/DMSE

  7. Molecular Orientation and Strength MIT/DMSE

  8. Polyamides Carouthers: nylon 66 Kwolek: aramid MIT/DMSE

  9. Kevlar Fibers – a polyaramid MIT/DMSE

  10. Modern Lightweight Personnel Armor MIT/DMSE

  11. Panel and Bullet After Impact MIT/DMSE

  12. Strain and Displacement in Fabric Layer MIT/DMSE

  13. Vs-Vr Plot – Kevlar 29, Single Layer MIT/DMSE

  14. Influence of Strength and Stiffness on V50 MIT/DMSE

  15. MIT/DMSE

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