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Which polymer is employed in bullet-proof glass?

1. PMMA
2. Lexan
3. Nomex
4. Kevlar

Correct answer: Lexan

Solution

Bullet-proof and impact-resistant transparent panels are made from Lexan, the trade name for polycarbonate, prized for extreme toughness. PMMA (acrylic/Plexiglas) is far more brittle, Nomex and Kevlar are aramid fibres used in protective fabrics, not glazing.

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