Question

What about Kevlar makes it so strong?
A. The molecules are short and create density
B. The molecules stack together in crystal-like structures
C. The molecules in Kevlar form a cylindrical-like structure
D. Kevlar is made with spider silk, a naturally strong material

Answer 1

B. The molecules stack together in crystal-like structures

Kevlar is a type of aramid fiber, and its strength comes from the alignment and stacking of its long, rigid polymer chains. This alignment allows for strong intermolecular interactions, contributing to its high tensile strength and durability.