Wednesday, August 18, 2010

Polythene


Polyethylene or  polythene is a thermoplastic commodity heavily used in consumer products. Polythene is a very important component . Lets understand the properties of polythene and the polythene pollution and its effects.



  • It has a melting point of 115 degree celscius.
  • Polythene has low crystallinity (50-60% crystalline). Main chain contains many side chains of 2-4 carbon atoms leading to irregular packing and low crystallinity (amorphous)
  • It is more flexible than HDPE due to lower crystallinity
  • Polythene retains toughness & pliabilty over a wide temperature range, but density drops off dramatically above room temperature.
  • Good transparency since it is more amorphous

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