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Which of the following plastics is opaque?

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in Food Packaging Technology by (63.0k points)
Which of the following plastics is opaque?

(a) Polyethylene Terephthalate (PET)

(b) Polycarbonate (PE)

(c) Polyphenylene Sulfide (PPS)

(d) Polyvinyl Chloride (PC)

I have been asked this question in homework.

My doubt is from Optical, Mechanical Properties of Thermoplastic Polymers topic in portion Thermoplastic Polymers Properties & Processing of Food Packaging Technology

1 Answer

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Best answer
Right answer is (c) Polyphenylene Sulfide (PPS)

Explanation: Opaque plastics are those which block all lights and doesn’t let light to pass through it. Some plastics like Polyphenylene Sulfide are naturally opaque in nature. Other plastics can be made opaque by using additives. However, using some techniques, even opaque plastics can be made transparent.

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