Polystyrene , dacron and orlon are classified respectively as

Options

A. Chain growth, step growth , step growth
B. Chain growth , step - growth , step growth
C. Chain growth, step - growth , chain growth
D. Step growth, step growth , chain growth

Answer

To classify Polystyrene, Dacron, and Orlon, we need to understand the types of polymers they represent. Let's break down the classification step by step.

### Step 1: Identify Polystyrene
- **Polystyrene** is a synthetic aromatic hydrocarbon polymer made from the monomer styrene. It is classified as a **chain growth polymer** (also known as addition polymer) because it is formed by the polymerization of vinyl monomers through a chain reaction mechanism.

### Step 2: Identify Dacron
- **Dacron** is a brand name for a type of polyester, specifically polyethylene terephthalate (PET). It is produced through a process called **step growth polymerization** (also known as condensation polymerization), where monomers react to form dimers, trimers, and eventually long-chain polymers.

### Step 3: Identify Orlon
- **Orlon** is a trade name for a type of acrylic fiber, which is made from the polymerization of acrylonitrile. Similar to Polystyrene, Orlon is also classified as a **chain growth polymer** because it is produced through the polymerization of vinyl derivatives.

### Conclusion
Based on the classifications:
- Polystyrene: Chain growth polymer
- Dacron: Step growth polymer
- Orlon: Chain growth polymer

Thus, the correct classification for Polystyrene, Dacron, and Orlon is **Chain growth, Step growth, Chain growth**.

### Final Answer
The answer is: **Chain growth, Step growth, Chain growth** (Option C).

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