Plastic is a material that has become ubiquitous in our modern world, with a wide range of uses from packaging and construction to consumer goods and electronics. It is lightweight, durable, and versatile, making it a popular choice for many applications. But what is plastic made of?
In general, plastic is made from polymers, which are long chains of repeating molecules called monomers. These monomers can be natural or synthetic, and there are many different types of plastic that are made from different combinations of polymers.
Let’s take a closer look at the most common types of plastic and their composition:
- Polyethylene (PE)
Polyethylene is the most common type of plastic and is used in a variety of applications, from packaging to toys. It is made from ethylene, which is a gas that is produced from petroleum or natural gas. The ethylene is polymerized to form long chains of polyethylene, which can be further processed to create different grades of plastic with varying properties.
- Polypropylene (PP)
Polypropylene is another common plastic that is used in packaging, automotive parts, and consumer goods. It is made from propylene, which is a gas that is also produced from petroleum or natural gas. Like polyethylene, polypropylene is polymerized to form long chains of polypropylene, which can be further processed to create different grades of plastic with varying properties.
- Polyvinyl Chloride (PVC)
Polyvinyl chloride is a plastic that is used in pipes, window frames, and other construction applications, as well as in consumer goods like inflatable toys and shower curtains. It is made from vinyl chloride, which is a gas that is produced from petroleum or natural gas. The vinyl chloride is polymerized to form long chains of polyvinyl chloride, which can be further processed to create different grades of plastic with varying properties.
- Polystyrene (PS)
Polystyrene is a plastic that is used in packaging, insulation, and consumer goods like disposable cutlery and CD cases. It is made from styrene, which is a liquid that is produced from petroleum or natural gas. The styrene is polymerized to form long chains of polystyrene, which can be further processed to create different grades of plastic with varying properties.
- Polyethylene terephthalate (PET)
Polyethylene terephthalate is a plastic that is used in packaging for food and beverages, as well as in textile fibers and consumer goods like water bottles. It is made from terephthalic acid and ethylene glycol, which are both derived from petroleum or natural gas. These two compounds are reacted to form long chains of polyethylene terephthalate, which can be further processed to create different grades of plastic with varying properties.
- Polycarbonate (PC)
Polycarbonate is a plastic that is used in eyeglasses, electronic components, and automotive parts. It is made from bisphenol A and phosgene, which are both derived from petroleum or natural gas. These two compounds are reacted to form long chains of polycarbonate, which can be further processed to create different grades of plastic with varying properties.
- Acrylonitrile Butadiene Styrene (ABS)
Acrylonitrile butadiene styrene is a plastic that is used in automotive parts, toys, and consumer goods like computer keyboards. It is made from a combination of acrylonitrile, butadiene, and styrene, which are all derived from petroleum or natural gas. These three compounds are polymerized together to form long chains of ABS, which can be further processed to create different grades of plastic with varying properties.