The term amorphous refers to the morphology of polymeric materials. In this case, the carbon chains are long and unorganized, intertwining to create a glasslike material. Due to the lack of organization or ability to organize, no crystallinity is observed in amorphous polymers, making their strengths temperature dependant. Basically, as the temperature increases, the amorphous polymer will soften gradually. The defining temperature for amorphous polymers is the glass transition temperature, or Tg. Below this temperature, the amorphous chains become immobilized and rigid and behave like glass.