Organic material in engineering

Organic material in engineering

1. Types

   • Natural
     • Animal
       • DNA
       • Collagen
       • Skin
       • Silk
       • Hair
     • Vegetable
       • Cautchouc
       • Collagen
       • Rubber
       • Celullose
       • Wood
     • Non artificial polymer
   • Synthetic
     • Derived from petroleoum and oil
     • Made in laboratory
     • examples
       • Teflon
       • Nylon
       • PVC
     • Any molecule cab be polimerized

2. Polymers

   • Long Chains of molecules
   • Diference with other materials
     • When heat and cool
       • Don´t obtain the same polymer
   • Have different properties
     • depends
       • molecule
       • type of bond

3. Melting Point

   • Thermoplastic
     • Melt when recives heat
     • Becomes moldable when is heated
     • Solidifies whith cooling
     • Examples
       • PE
   • Thermosets
     • Is irreversibly harder from a soft or liquid polymer
     • Dont melt when it recives heat
     • Examples
       • Epoxi resin
       • Polyester resin

4. Engineering Use

   • Chemical resistance
   • Advantages
     • Low cost
     • Low weight
     • High strength
     • Resistance
     • Elasticity
     • Ductility
   • Limitations
     • Limited to reuse
     • Thermal descomposition

5. Reinforced composites

   • Polimer filled with
     • Nanomaterials
       • Nanotubes
       • Pouder ceramics
     • Fibers
       • Metal
       • Glass
       • Ceramic
     • Others
       • PVC
       • Concrete
   • Improve mechanical properties of the composites
   • Polymer filled to
     • Any other material
     • Other polymers

6. Stiffness cristalinity

   • Lamella
     • WHen the Chains fold toguether
     • Composed by
       • Spherulites
         • Spherical semicrystalline regions
   • Cause
     • Van der Walls Forces
       • Non/ Low
         • Weakness
         • Soft
         • Rubbery
         • Ductil
       • High
         • Atraction
         • Rigid
         • Strong

7. Nature

   • Long life time
     • The element use is not repair, instead is changed
   • No biodegradation

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