Question

Which of the following properties are imparted to the fibres because of the amorphous region?
A. Flexibility
B. Better Strength
C. Extensibility
D. Better moisture absorption
E. Better chemical resistance
Choose the correct answer from the options given below:

• A. A, B, C only
• B. B, C, D only
• C. A, C, D only
• D. C, D, E only

Hint:

Fiber Morphology:
Amorphous Region $\rightarrow$ Flexibility, Extensibility, Moisture absorption, Dyeability.
Crystalline Region $\rightarrow$ Tensile Strength, Rigidity, Chemical resistance.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Polymer morphology in textile fibers is divided into dense ordered crystalline zones and open random amorphous zones.

Step 2: Detailed Explanation:
Polymer microstructure and physical properties:
1. Amorphous Regions (Disordered Polymer Chains): Molecules are loosely packed with abundant internal free volume, imparting Flexibility (A), elastic Extensibility (C), and High Moisture Absorption Dyeability (D) because water and dye molecules readily penetrate the open spaces.
2. Crystalline Regions (Ordered Polymer Chains): Impart high tensile strength, stiffness, and chemical resistance.
Therefore, properties A, C, and D are imparted by the amorphous region.

Step 3: Final Answer:
Thus, the correct choice is A, C, D only, matching option (C).