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Which of the following thermoplastics is used for making eye lenses?(a) Polytetrafluoroethylene(b) Polyethylene terephthalate(c) Polymethyl methacrylate(d) Polyvinyl chlorideThe question was posed to me in semester exam.I'm obligated to ask this question of Materials topic in division Materials of Corrosion Engineering

Answer»

Correct ANSWER is (c) Polymethyl methacrylate

Best explanation: Polymethyl methacrylate is the POLYMER of many METHYL methacrylate MONOMERIC units. It is used for making eye LENSES as it is transparent to light. It is usually denoted as PMMA.



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