Machine-translated by Google. Questions are authored in English.
Top

Discussion

The glass transition temperature of a polymer is the temperature at which

  • A.the crystals in it melt
  • B.the polymer begins to decompose
  • C.crosslinking of the chains begins
  • D.the amorphous regions turn rubbery

Answer: D

It governs the useful temperature range of an amorphous polymer and is quite distinct from the melting point of any crystalline regions. Polystyrene is brittle below its transition and rubbery above. The transition is not a true phase change.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.