Question

The essential requirements of fiber forming polymers are \(\underline{\hspace{2cm}}\). 
A. Linear polymer 
B. Three dimensional polymer 
C. High molecular weight 
D. Strong lateral forces

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

Hint:

To form a strong fiber, a polymer needs to be like a bundle of long, strong ropes tied together: - Linear Polymer: The ropes are long and straight, not a tangled mess (A). - High Molecular Weight: The ropes are very long (C). - Strong Lateral Forces: The ropes are held together tightly (D).

Answer 1

The Correct Option is C

Step 1: Define "fiber forming polymers": Polymers capable of being oriented into fibrous structures with desirable textile properties (e.g., strength, flexibility).

Step 2: Evaluate the criteria.
- A. Linear polymer: The polymer chains must be long and unbranched to align during drawing, a process essential for fiber strength. This is mandatory.
- B. Three dimensional polymer (Cross-linked): Polymers with a three-dimensional or heavily cross-linked structure (e.g., thermoset resins) are rigid and unsuitable for fiber formation. This is undesirable.
- C. High molecular weight: The polymer chains need to be long (high degree of polymerization) to entangle and create intermolecular forces for structural integrity and strength. This is mandatory.
- D. Strong lateral forces (Intermolecular forces): The aligned polymer chains must exhibit strong intermolecular forces (e.g., hydrogen bonds, dipole-dipole interactions) to resist slippage under stress, thus providing tenacity. This is mandatory.

Step 3: Synthesize the essential criteria: The polymer must be linear (A), possess a high molecular weight (C), and exhibit strong lateral forces (D). Based on the requirements, and ignoring a likely typo, the correct combination is A, C, and D.