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