Question
The main objective of drawing of synthetic fibre is to impart the molecular ________ along the fibre axis.
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
orientation
Synthetic Fibre Drawing: Achieving Molecular Orientation
The primary goal during the process of drawing synthetic fibres is to improve their strength and mechanical properties. This is achieved by aligning the long polymer molecules that make up the fibre.
Molecular Alignment Explained
- Drawing Process: Synthetic fibres, after extrusion, are stretched mechanically. This process is called drawing.
- Molecular Movement: During drawing, the randomly arranged or partially aligned polymer chains within the fibre are pulled and forced to align parallel to the fibre's length (axis).
- Resulting Property: This alignment, known as molecular orientation, significantly increases the tensile strength and reduces the extensibility of the fibre. The molecules are packed more closely and their intermolecular forces become more effective along the axis.
- Why Orientation? While drawing can affect crystallinity, the main objective is the alignment (orientation) of chains along the axis to impart strength. Elongation is a consequence, and randomness is reduced, not imparted.
Therefore, the main objective of drawing synthetic fibre is to impart molecular orientation along the fibre axis.
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