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Low density polyethylene differs from the high density grade chiefly in having

  • A.an entirely different monomer
  • B.extensive branching of the chains
  • C.a considerably higher molecular weight
  • D.a crosslinked network structure

Answer: B

Branching reduces crystallinity and therefore density, stiffness and melting point. Both are made from ethylene, and the difference is entirely one of process and catalyst. Density and stiffness follow from the crystallinity.

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