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POLYMERS - Coggle Diagram

- - - - Homopolymer
      - Coploymer
      - Disadvantages PP
        
        Low specific weight (density)
        
        Excellent chemical resistance
        
        High merging temperature
        
        Good balance rigidity/tenacity/strength
        
        Adaptable to many thermoforming methods
        
        Great variety of special types for specific applications.
        
        Excellent dielectric properties Cheap
      - Advantages PP
        
        Flammable
        
        Fragile/brittle at low temperatures
        
        Low UV resistance
    - - High density polyethylene
        
        Advantages
        
        Good properties that prevent the passing of humidity, it is useful in many applications of packaging.
        
        Relative chemical inactivity.
        
        Good thermo stability in the interval from –
        40° to 316°C.
        
        Disadvantages
        
        More elevated temperatures may take it to
        its degradation level.
        
        A tendency for deformation prevents itfrom being considered as a truly engineering plastic.
      - Low density polyethylene
        
        Disadvantages
        
        LDPE might not be adequate in applications that require extreme rigidity, good isolatedproperties, a significant resistance to tension or a high resistance ton temperature.
        
        Advantages
        
        Has a good balance of mechanic properties
        with an easy processing and low cost.
        
        Can be manufactured using many different methods and is one of the larger worldwide production plastics.
  - - - properties
        
        lightweight
        
        excellent wetting
        
        good inherent strength
        
        making hin ultra-light
        orthopedic appliances possible
  - - - use
        
        some prosthetic sockets
        
        O&P fabrication
    - - use
        
        Tendon Prostheses
    - - use
        
        Electronics
        
        Medical
    - - Uses
        
        Orthotics
        
        Plastic wraps
        
        Foam rubber
        
        with burn patients, also with facial damage
    - - for wrist, spiral
        and semispiral foot orthosis
    - - Use
        
        P&O Lamination