Multiple choice

Which of the following statements about Lexan are not correct?

  1. It is manufactured by the reaction 4, 4'-(propane-2, 2-diyl)diphenol (BPA) with carbonyl dichloride.
  2. It belongs to the group of linear thermoplastic polyesters.
  3. It is highly opaque.
  4. It has a glass transition temperature of about 200°C.

  1. 1 and 2

  2. 1 and 3

  3. 1 and 4

  4. 2 and 3

  5. 3 and 4
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Polycarbonate (Lexan) is highly transparent to visible light, with better light transmission than many kinds of glass. Polycarbonate (Lexan) has a glass transition temperature of about 147°C, so it softens gradually above this point and flows above about 155°C.

Keep practicing — related questions