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Which of the following are applications of polypropylene?

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Which of the following are applications of polypropylene?

(a) Buckets, bottle crates

(b) CD cases, food boxes

(c) Wire insulation, piping

(d) Valves, fittings

This question was addressed to me in quiz.

Enquiry is from Thermoplastics topic in chapter Non Metallic Materials of Engineering Material & Metallurgy

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The correct answer is (a) Buckets, bottle crates

To elaborate: Polypropylene is a high strength thermoplastic polymer which also has better stiffness than polyethylene. They are used for making buckets, battery cases, bottle and bottle caps etc. CD cases and food boxes are common applications of polystyrene. Wire insulation and piping are done using polyethylene.

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