Crazes in polymers are regions of localized deformation and microvoids that can affect ductility.

• A. True
• B. False
• C. Only in elastomers
• D. Only after melting

Answer: (A)

Crazes are zones of localized plastic deformation in polymers that form microvoids bridged by slender fibrils of polymer. As the material is pulled, these voids grow and the fibrillar network carries load, dissipating energy and slowing crack growth. This damage mechanism develops in the solid state, well below melting, and it can significantly influence how a polymer deforms and fails—often altering its ductility and toughness. Because crazes involve actual deformation features and not melting, and they are not restricted to elastomers, the statement is correct.