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Polymer materials become brittle below ________

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Polymer materials become brittle below ________

(a) Critical temperature

(b) Glass transition temperature

(c) Melting point temperature

(d) Room temperature

The question was asked in an online interview.

The above asked question is from Fracture Toughness, Protection against Fracture in portion Imperfection in Metal Crystals, Fracture, Corrosion and Oxidation of Engineering Material & Metallurgy

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Correct option is (b) Glass transition temperature

The explanation: It is known that polymeric materials become brittle below the glass transition temperature Tg. Molecular activity is stationary below this temperature.

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