Question: What makes polystyrene a commonly used plastic in packaging? a) PS can be used as crystal PS, HIPS, and Foam b) PS is rigid and
What makes polystyrene a commonly used plastic in packaging?
a) PS can be used as crystal PS, HIPS, and Foam
b) PS is rigid and has higher Tg, thus does not deform when in contact with hot liquids or food
c) PS is an excellent oxygen barrier
d) Both a and b
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