Which statement is correct about the quality of crystalline fibres compared to amorphous fibres?

Crystalline fibres are generally stronger than their amorphous counterparts due to their organized molecular structure. In crystalline fibres, the chains of molecules are aligned in a regular pattern, allowing for strong intermolecular forces to develop. This alignment increases the tensile strength of the fibres, making them more resistant to breaking when subjected to stress.

In contrast, amorphous fibres possess a more random arrangement of molecules. This disorganized structure can limit their strength and stability, making them less effective in applications requiring durability under tension. Though amorphous fibres may have other beneficial properties, such as improved dye uptake or softness, these do not equate to strength and durability.

The understanding of crystalline versus amorphous structures is crucial in textile design as it influences choices in materials based on required performance characteristics. For example, when strength is a priority—such as in applications like industrial fabrics or heavy-duty apparel—crystalline fibres are usually preferred.