Primary Component of Styrofoam:
Styrofoam, also known as expanded polystyrene (EPS), is primarily made from polystyrene. This material is widely used in packaging, insulation, and crafting due to its lightweight and insulating properties.

Polystyrene:
- Polystyrene is a synthetic polymer made from the monomer styrene.
- It is a thermoplastic material that can be easily molded into various shapes.
- In the case of Styrofoam, polystyrene beads are expanded and fused together to form the final product.

Properties of Polystyrene:
- Polystyrene is lightweight, rigid, and has excellent thermal insulation properties.
- It is resistant to moisture, making it ideal for packaging materials.
- The material is also affordable and versatile, making it a popular choice for various applications.

Manufacturing Process:
- The production of Styrofoam involves heating and expanding polystyrene beads using steam.
- The expanded beads are then molded or fused together to form the desired shape.
- The final product is lightweight, durable, and has a high strength-to-weight ratio.

Environmental Impact:
- While Styrofoam offers many benefits, it is not biodegradable and can contribute to environmental pollution.
- The material is often not recyclable in traditional recycling facilities, leading to concerns about its impact on the environment.
In conclusion, the primary component of Styrofoam is polystyrene, a versatile and widely used material in various industries. Despite its benefits, the environmental impact of Styrofoam has raised concerns, leading to efforts to find more sustainable alternatives.