Kevlar

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Kevlar

• By Brianna Flores
• MEEN 3344

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What is Kevlar?

• Manmade organic fibers were created in 1965 by
  two research scientist, Stephanie Kwolek and
  Herbert Blades from DuPont.
• Has 5 times the strength-to-weight ratio of Steel.

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Structure

• Crystalline polymers
• Consists of long molecular chains from five to a
  million mers bonded together
• Each segment is a chemical unit that contains 14
  carbon atoms, 2 nitrogen atoms, 2 oxygen atoms
  and 10 hydrogen atoms.

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Properties

• Low thermal shrinkage
• Lightweight
• Flexible
• Comfortable
• Low electrical conductivity
• High toughness
• High cut-resistance
• High chemical resistance
• Flame resistance

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Uses

• Bulletproof vest
• Sports equipment
• Automotive parts
• Tires
• Fiber-Optic and Electromechanical Cables
• Industrial and Marine Utility Ropes
• Fire resistant mattress material

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References

• http//www.infinitycomposites.com/cgi-bin/infinity
  db.pl?catcarkev
• http//www.dupont.com/kevlar/whatiskevlar.html