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: Understand what "fiber forming polymers" are. These are polymers that can be oriented into a fibrous structure with useful textile properties like strength and flexibility.

Step 2: Analyze the requirements.
- A. Linear polymer: The polymer chains must be long and linear, not branched, to allow them to align parallel to each other during the drawing process. This alignment is crucial for fiber strength. This is an essential requirement.
- B. Three dimensional polymer (Cross-linked): A three-dimensional or heavily cross-linked polymer (like thermoset resins) forms a rigid network and cannot be drawn into a fiber. This is the opposite of what is required.
- C. High molecular weight: The polymer chains need to be very long (high degree of polymerization) so that they can entangle and create sufficient intermolecular forces to hold the structure together and provide strength. This is an essential requirement.
- D. Strong lateral forces (Intermolecular forces): There must be strong forces (like hydrogen bonds or dipole-dipole interactions) between the aligned polymer chains to prevent them from slipping past one another under stress. These forces give the fiber its tenacity. This is an essential requirement.

Step 3: Combine the essential requirements. The polymer must be linear (A), have a high molecular weight (C), and have strong lateral forces (D). The options seem to have a typo, but based on the requirements, the correct combination is A, C, and D.