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A filler is added to a plastic chiefly to

  • A.increase the transparency of the article
  • B.raise the average molecular mass
  • C.reduce cost and modify properties
  • D.lower the glass transition temperature

Answer: C

Wood flour, calcium carbonate, mica or glass fibre displaces expensive resin and may stiffen, toughen or improve the dimensional stability. It generally reduces the transparency and the impact resistance of an unreinforced grade.

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