Maya Ellison
Plastic is a synthetic or semi-synthetic material that usually comes from petrochemicals or other natural sources such as cellulose, coal, natural gas, salt, and crude oil. The term 'plastic' comes from the Greek word 'plastikos' and the Latin 'plasticus', meaning 'fit for moulding' or 'capable of being moulded into various forms'. Plastics are organic materials with unique qualities such as durability, low cost, and ease of production, making them extremely useful for manufacturers. They are polymers, which means they are made by linking chains of molecules (monomers) together to create a large molecule (polymer). This process gives plastics their malleability and strength. There are dozens of different types of plastics, including polyethylene, polyvinyl chloride (PVC), and polystyrene, each with distinct properties and uses.
| Characteristics | Values |
|---|---|
| Definition | Plastic is a synthetic or semi-synthetic material made from petrochemicals or natural materials like cellulose, coal, natural gas, salt, and crude oil. |
| Origin | The term 'plastic' comes from the Greek word 'plastikos' and the Latin 'plasticus', meaning 'fit for moulding' or 'capable of being moulded into various forms'. |
| Types | Commodity resins, specialty resins, polymers, microplastics, high-performance plastics, resins, thermoplastics, and thermosets. |
| Examples | Polyethylene, polypropylene, polyvinyl chloride (PVC), polystyrene, aramids, ultra-high-molecular-weight polyethylenes (UHMWPE), polyetheretherketone (PEEK), polyetherimide (PEI), polycarbonate, and acrylic. |
| Uses | Packaging, construction, agriculture, toys, electronics, automotive parts, medical devices, renewable energy infrastructure, and more. |
| Environmental Impact | Plastic contributes to pollution and waste, especially in the marine environment, and has negative effects on ecosystems and human health. However, it can also enable sustainability by reducing fuel consumption in transport and providing insulation in buildings. |
| Production | Plastics are made through polymerization or polycondensation, creating long chains of molecules (polymers) that can be moulded into various shapes. |
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What You'll Learn
Plastic is a synthetic or semi-synthetic material
The raw materials used to produce plastics today are mostly found in the natural world and include cellulose, coal, natural gas, salt, and crude oil. In the future, plastics will increasingly be made from waste, renewable materials, or CO2. Plastic is lightweight, flexible, non-conductive, durable, and low cost, making it ideal for a wide range of applications.
There are many different types of plastics, each with unique properties and uses. Some types of plastic are reusable, while others are not due to the chemicals they contain. Some can be recycled, while others need special disposal methods. The Society of the Plastics Industry introduced the Resin Identification Code (RIC) system in 1988, dividing plastic resins into seven categories to facilitate recycling.
Plastics can be divided into two broad categories based on their chemical composition: those made of polymers with only aliphatic (linear) carbon atoms in their backbone chains, and those made of heterochain polymers, which contain atoms like oxygen, nitrogen, or sulfur in addition to carbon. Commodity resins, or plastics produced in high volumes at low costs, include polyethylene, polypropylene, polyvinyl chloride, and polystyrene. Specialty resins, on the other hand, are produced in lower volumes at higher costs and are tailored for specific applications.
Plastics have contributed to sustainability by reducing weight in transportation, providing insulation in buildings, and being used in renewable energy technologies like solar panels and windmill blades. However, the presence of plastic in the environment can harm ecosystems and human health, and there is a global focus on moving towards a circular economy for plastics to reduce waste.
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Plastic is derived from the Greek word 'plastikos'
The term "plastic" is derived from the Greek word "plastikos", which means "'fit for moulding' or "capable of being moulded into various forms". It refers to the material's malleability or plasticity during manufacturing, which allows it to be cast, pressed, or extruded into an array of shapes. The word "plastikos" is also related to the Greek word "plastos", which means "moulded", and Greek word "plassein", which means "to mould".
Plastic is a generic term for a wide range of synthetic or semi-synthetic materials. They are polymers, which means they are made by linking chains of molecules (monomers) together to create a large molecule (a polymer). These links make polymers strong and durable. This is why "poly-" appears in common names for plastic, like polyethylene.
Polymers can be molten and mechanically recycled into new items or broken up and reconnected through chemical recycling, allowing for almost limitless recycling. Plastics can also be produced from waste, CO2, and renewable raw materials, such as cellulose, coal, natural gas, salt, and crude oil.
Plastics have contributed to sustainability. For example, using plastics instead of glass makes a product much lighter, so shipping or transport requires less fuel and produces fewer emissions. They are also used for insulation in houses, saving energy with their thermal properties, and in renewable energy generation through solar panels and windmill blades.
The world's first fully synthetic plastic was Bakelite, invented in New York in 1907 by Leo Baekeland, who coined the term "plastics".
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Plastic is used in packaging, buildings, automobiles, furniture, and toys
The term "plastics" was coined by Leo Baekeland, who invented the world's first fully synthetic plastic, Bakelite, in New York in 1907. Plastics are used in a wide range of applications, including packaging, buildings, automobiles, furniture, and toys.
Packaging
Plastics are commonly used in packaging due to their durability, safety, and hygiene. They are shatterproof and do not break into dangerous shards if dropped. Plastic packaging can be easily sealed, ensuring the safety and longevity of the products inside. It is also lightweight, reducing fuel consumption and emissions during transport. The versatility of plastic allows for an infinite variety of shapes, colours, and technical properties, making it suitable for packaging various products, from liquids to solids.
Buildings
The construction industry is one of the biggest consumers of plastic. Plastics are used in buildings for piping, plumbing, vinyl siding, and insulation. Common plastic building materials include polyvinyl chloride (PVC), polyethylene (PE), and polypropylene (PP). PVC is used for pipes, cables, flooring, windows, and roofing due to its strength and durability. PE is used in pipes, cladding panels, and roofing sheets, while PP is used in carpeting, roofing sheets, and electrical cable insulation.
Automobiles
Plastic is frequently used in vehicle manufacturing, with up to 20% plastic content in automobiles. Polypropylene, a thermoplastic polymer, is commonly used due to its heat resistance, chemical resistance, and impact resistance. It is found in car bumpers, gas cans, and carpet fibres. Polyvinyl chloride (PVC) is also used in cars for its formability and sleek finish, often seen in dashboards and automotive body parts. Polycarbonate is another impact-resistant plastic used for bumpers and headlight lenses, reducing vehicle weight and improving fuel efficiency.
Furniture
Plastic is used in furniture, although specific details on its applications in this area are scarce.
Toys
Polymers are well-suited for making toys due to their lightweight and chemical-resistant properties. Plastic toys are easy for children to handle, resistant to marks and stains, and generally safe if they do not contain compounds like bisphenol-A (BPA) or phthalates.
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Plastic contributes to sustainability
The term 'plastics' refers to a range of synthetic or semi-synthetic materials that are made from organic polymers. These polymers are derived from raw materials such as cellulose, coal, natural gas, salt, and crude oil, and are linked together to form long chains, creating a strong and durable material. The word 'plastic' comes from the Greek 'plastikos' and the Latin 'plasticus', meaning 'fit for moulding' or 'capable of being moulded'.
Despite the environmental concerns associated with plastic, it does have some contributions to sustainability. Firstly, plastics are lightweight, which means that when used in packaging and transportation, they require less fuel for shipping, resulting in reduced emissions. Plastic is also used for insulation in buildings, where it can save energy due to its thermal properties and resistance to corrosion. Additionally, plastic is a key component in solar panels and windmill blades, which are used to generate renewable green energy.
Modern plastics can be used in 3D printing without creating waste, and there is a growing focus on a circular economy for plastics. This involves recycling and reusing plastic materials, minimising waste, and utilising alternative raw materials such as waste and renewable sources, or even CO2. For example, the European Commission's Circular Plastics Alliance aims to introduce 10 million tonnes of recycled plastic into the EU market by 2025.
Furthermore, certain types of plastics offer specific sustainability advantages. High-performance plastics, for instance, possess superior properties such as high-temperature resistance, chemical corrosion resistance, excellent mechanical and electrical characteristics, lightweight construction, and versatility. These qualities make them ideal for applications in aerospace, medicine, and military equipment.
However, it is important to acknowledge the negative impacts of plastic on the environment and human health. Plastic pollution is a significant global issue, with plastic waste contaminating marine ecosystems, freshwater systems, and land. It is estimated that 19-23 million tonnes of plastic waste enter aquatic ecosystems annually, and plastic has been detected even in remote locations like Mount Everest and the Marianas Trench. Plastic's durability means it can persist in the environment for over 1,000 years, leading to long-term issues such as littering, leaching of toxic chemicals, and microplastic ingestion by marine life and humans.
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Plastic is a polymeric material
Plastics are valued for their durability, low cost, and ease of production and use. They can be categorized as either ""commodity" or "specialty" resins. Commodity resins, such as polyethylene, polypropylene, polyvinyl chloride, and polystyrene, are produced in high volumes at a low cost for common disposable items and durable goods. On the other hand, specialty resins are tailored for specific applications, produced in lower volumes, and are more expensive.
The versatility of plastics allows them to be used in a wide range of applications, from packaging and construction to automotive, electronics, and medical devices. For example, polyethylene terephthalate (PET) is commonly used for food and drink packaging due to its oxygen barrier properties, while polyvinyl chloride (PVC) is used in construction for pipes, windows, and doors.
Plastics also contribute to sustainability. For instance, using plastic instead of glass reduces weight, requiring less fuel for transport and lowering emissions. Additionally, plastic insulation in houses can save energy due to its thermal properties. However, the environmental impact of plastic production and disposal, particularly in marine areas, has raised concerns.
There are various types of plastics, each with unique properties. For instance, polycarbonate is known for its strength and design flexibility, while polyethylene can be manufactured in varying densities, giving it a range of physical properties. Understanding the different types of plastics and their characteristics is essential for making informed decisions about the products we use and their impact on the environment.
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Frequently asked questions
Plastic is a synthetic or semi-synthetic material that usually comes from petrochemicals or things like cellulose and starch. Plastics are polymers, which means they are made by linking chains of molecules (monomers) together to create a large molecule (a polymer).
Polyethylene, polypropylene, polyvinyl chloride, and polystyrene are some examples of plastic. Polyethylene, for example, can be found in a wide variety of products due to its varying densities, which give it unique physical properties. Polyvinyl chloride (PVC) is used in construction and pipes because of its strength and durability.
Plastics can be divided into two distinct categories based on their chemical composition. One category is made up of polymers having only aliphatic (linear) carbon atoms in their backbone chains, and the other category of plastics contains atoms such as oxygen, nitrogen, or sulfur in their backbone chains, in addition to carbon. Plastics can also be classified as either ""commodity" resins or "specialty" resins. Commodity resins are produced at a high volume and low cost, while specialty resins are tailored to specific applications and produced at a low volume and higher cost.
Plastic is used in a wide range of applications, including packaging, agriculture, construction, electronics, automotive, and medical devices. Plastic contributes to sustainability by making products lighter and more fuel-efficient during shipping or transport. Plastic is also used for insulation in houses, reducing energy consumption.
