Properties of Plastics:

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Properties of Plastics

• any shape injection molded, extruded, flexible
  molds
• moisture resistant, but can be water absorbent
• hard or soft, flexible, shape memory, shape
  adjusting
• transparent or opaque or in-between
• may not be UV resistant, but is often treated to
  be
• Electrical insulators

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Composition of Plastics

• Made from Carbon and Hydrogen
• Other elements are embedded
• Examples of monomers
• ethylene, propylene, styrene, phenol,
  formaldehyde, ethylene glycol, vinyl chloride
  (CH2CH-Cl), teflon (CF2CF2 ) and acetonitrile

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Different types of Plastics

• Properties of a polymer depend on
• The type of monomer or monomers that make up the
  polymer
• The arrangement of monomers within the polymer
• straight vs. branched
• Cross-linking of polymers

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• Recycling of Plastics
• NOT biodegradable
• Thermoforms may be recycled
• (more often down-cycled)
• Easily Recyclable
• Carcinogenic during recycling
• Carcinogenic compound
• Difficult to Recycle

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Resource to evaluate plastics
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