Which of the following grade of polystyrene is useful in optical applications?
A. general-purpose (GP-PS)
B. high impact (HIPS)
C. expanded grades
D. none of the mentioned
Answer:A
Which of the following grade of polystyrene is useful in optical applications?
A. general-purpose (GP-PS) B. high impact (HIPS) C. expanded grades D. none of the mentioned