Both polypropylene and polystyrene are polymers, which means they're composed of long chains of monomer molecules in regular strands. They are both widely used in a wide variety of industrial, commercial, and consumer applications.
Polypropylene is a thermoplastic polymer that's commonly made by chain-growth polymerization from the monomer propylene. It's a common type of plastic used in a wide variety of products, from packaging to rope and car parts.
It can also be molded or extruded into different shapes and forms, making it a versatile material. It is also a great candidate for recycling, as it can be melted down and reshaped to new forms.
However, it can only be recycled if it's disposed of properly. The level of recyclability varies from state to state, and it's important to check with your local hauler before disposing of any plastic items.
Polystyrene is another type of plastic that's commonly used in a wide variety of products, including foams and films. It can be shaped into a number of different forms and is highly durable, allowing it to be used in protective packaging for electronics.
Styrofoam is a plastic that's lightweight and easy to form into various shapes. It's also incredibly resistant to heat, so it's a popular choice for food packaging.
It can be molded, extruded, or hot-rolled into sheets. It's a great option for insulating and shock-absorbing materials, as well as for floatation aids.
Polystyrene is also a common plastic used in disposable utensils, such as forks and knives. It's not as pliable or flexible as polypropylene, but it does break down more easily.