Which of the following are thermoplastic polmers ?

Options

A. Polythene , urea-formaldehyde , polyvinyls
B. Bakelite , polythene, polystyrene
C. Polythene, polystyrene, polyvinyls
D. Urea-formaldehyde, polystyrene, bakelite

Answer

To determine which of the following are thermoplastic polymers, we can follow these steps:

### Step 1: Understand the Definition of Thermoplastic Polymers
Thermoplastic polymers are materials that become soft and moldable upon heating and solidify upon cooling. They are characterized by their linear or slightly branched molecular structure.

### Step 2: Identify Key Characteristics
1. **Molecular Structure**: Thermoplastic polymers have a linear or slightly branched structure.
2. **Reversible Process**: They can be repeatedly softened by heating and hardened by cooling.
3. **Intermolecular Forces**: The intermolecular forces in thermoplastics are intermediate between elastomers and fibers.

### Step 3: List Common Examples
Common examples of thermoplastic polymers include:
- Polythene (Polyethylene)
- Polystyrene
- Polyvinyl Chloride (PVC)
- Polypropylene
- Teflon (Polytetrafluoroethylene)

### Step 4: Analyze the Options Given
If the question provides options, we would need to analyze each option to see if they match with the common examples of thermoplastic polymers listed above.

### Step 5: Select the Correct Answer
Based on the analysis, the correct answer would be the option(s) that include any of the common thermoplastic polymers mentioned.

### Final Answer
The thermoplastic polymers from the given options are polythene, polystyrene, and polyvinyls.

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