Which pair of polymers have similar properties?

Options

A. Nylon, PVC
B. PAN, PTFE
C. PCTFE, PTFE
D. Bakelite, alkyd resin

Explanation

To determine which pair of polymers have similar properties, we will analyze the given options one by one.

### Step 1: Analyze the first pair - Nylon and PVC
- **Nylon**: This is a polyamide polymer characterized by a large number of amide linkages. It is commonly used in textiles and fabrics.
- **PVC (Polyvinyl Chloride)**: This is a polymer made from the monomer vinyl chloride. It is primarily used in plumbing for pipes and has a different structure and application compared to Nylon.

**Conclusion**: Nylon and PVC do not have similar properties.

### Step 2: Analyze the second pair - PAN and PTFE
- **PAN (Polyacrylonitrile)**: This polymer is derived from the polymerization of acrylonitrile. It is used in applications like ultrafiltration membranes.
- **PTFE (Polytetrafluoroethylene)**: Known as Teflon, PTFE is used for non-stick coatings on cookware. Its structure is quite different from PAN.

**Conclusion**: PAN and PTFE do not have similar properties.

### Step 3: Analyze the third pair - PCTFE and PTFE
- **PCTFE (Poly-chloro-trifluoroethylene)**: This polymer has a similar carbon backbone to PTFE but differs in that it has a chlorine atom in its structure.
- **PTFE**: As mentioned, it is a fluoropolymer with a carbon backbone and fluorine atoms.

**Conclusion**: PCTFE and PTFE have similar properties due to their similar carbon backbone and structural characteristics.

### Step 4: Analyze the fourth pair - Bakelite and Alkyd Resin
- **Bakelite**: This is a thermosetting polymer formed from the condensation polymerization of formaldehyde and phenol.
- **Alkyd Resin**: This is a thermoplastic polymer formed from the reaction of polyhydric alcohol with polybasic carboxylic acid.

**Conclusion**: Bakelite and Alkyd resin do not have similar properties due to their different types (thermosetting vs thermoplastic).

### Final Conclusion
The pair of polymers that have similar properties is **PCTFE and PTFE**.

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