Chloe Zhang
Plastic is a synthetic polymer that is made from carbon-based compounds derived from fossil fuels. It is a large molecule made up of many smaller molecules that are typically repeating. The most common types of plastics, such as polyethylene and polystyrene, are made from hydrocarbons—substances containing primarily hydrogen and carbon. This has led to a debate about whether plastic is organic or inorganic. While plastic is made from organic compounds, it is not readily biodegradable, and thus, it is referred to as inorganic.
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What You'll Learn
Plastic is made of hydrocarbons
Plastic is a product of organic chemistry because it is made of hydrocarbons, which are compounds primarily containing hydrogen and carbon atoms. These hydrocarbons are derived from fossil fuels, which are organic in origin. The most common types of plastics, such as polyethylene and polystyrene, are made from hydrocarbons.
Plastics are polymers, which are large molecules made of many smaller, repeating molecules. The process of polymerisation involves converting light olefin gases (gasoline) such as ethylene, propylene, and butylene (monomers) into higher molecular weight hydrocarbons (polymers). This happens when monomers are chemically bonded into chains through catalysts.
Ethylene, a gaseous hydrocarbon, is an example of a monomer. When subjected to heat, pressure, and a catalyst, it joins together into long, repeating carbon chains. These joined molecules (polymers) form a plastic resin known as polyethylene (PE). PE-based plastic is processed in a factory to make plastic pellets, which are melted into a thick liquid and cast into a mould. As the liquid cools, it hardens into a solid plastic product.
Plastics are derived from natural, organic materials such as cellulose, coal, natural gas, salt, and crude oil. Crude oil, a complex mixture of thousands of compounds, must be processed before it can be used. This processing involves distillation to separate the heavy crude oil into lighter components called fractions. Each fraction is a mixture of hydrocarbon chains, differing in molecular size and structure. One crucial compound for plastic production is naphtha.
While plastic is chemically organic, it is generally referred to as "inorganic" because it is non-biodegradable. This is due to the fact that almost no living organism has evolved to metabolize its components.
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Plastic is not decomposed by living organisms
Plastic is a human innovation, and as such, it has only been in existence for around a hundred years. Living organisms have not had the time to adapt to and evolve with this new material. As a result, plastic is not considered biodegradable and does not decompose naturally.
Plastics are polymers, which are large molecules made up of many smaller molecules. The most common types of plastics, such as polyethylene and polystyrene, are made from hydrocarbons—substances containing primarily hydrogen and carbon. These plastics are derived from fossil fuels, which are organic in origin.
The process of biodegradation involves a series of organisms feeding on and metabolizing the components of a material. However, the carbon bonds in plastic are not the same as those found in nature, making them harder to break down. The enzymes in microorganisms that break down biodegradable materials do not recognize the bonds that hold plastic polymers together.
While some plastics are hydrolyzable and can be partially degraded by bacteria and fungi, most plastics are nonhydrolyzable and have a low level of biodegradation. The long molecular chains of these plastics require more enzymatic activity to break down. Additionally, as plastic degrades, it can release toxins into the surrounding soil, causing further environmental issues.
The durability and non-biodegradability of plastic have led to significant waste and pollution issues. Plastic waste can remain in the environment for centuries, harming wildlife, particularly marine life. While there are ongoing efforts to develop biodegradable alternatives, such as bioplastics, the current challenge is to find cost-effective ways to recycle and reuse traditional plastics.
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Plastic is a synthetic polymer
Polymers are chemical compounds composed of long, repeating chains of molecules. They can be naturally occurring, such as cellulose, latex, and rubber, or synthetic, like nylon, polyethylene, and polypropylene. The term "polymer" refers to the Greek prefix "poly-", meaning "many", and the suffix "-mer", meaning "parts". Polymers are characterized by their unique chemical composition and structure, which determine their properties and interactions with the environment.
Plastics are a specific type of synthetic polymer with a large molecular mass and a mostly linear structure. The first synthetic plastic, Bakelite, was created in 1909 for telephone and electrical components. Synthetic polymers, including plastics, have become an integral part of the global economy due to their versatility and low production costs. They are valued for their durability, lightweight nature, and ability to be moulded into various forms.
However, plastics have also contributed significantly to environmental pollution due to their slow biodegradability and the challenges associated with their disposal. Insects and bacteria, which typically degrade organic materials, are unable to break down plastics. As a result, plastic waste accumulates in landfills and oceans, causing harm to ecosystems and threatening the global food chain.
While plastic is often referred to as inorganic due to its non-biodegradability, it is scientifically considered organic because it is made of hydrocarbons and carbon-based compounds. This distinction is important in understanding the chemical nature of plastic and its impact on the environment.
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Plastic is not readily biodegradable
Plastic is a product of organic chemistry because it is made of chains of hydrogen and carbon atoms, derived from fossil fuels. However, plastic is not readily biodegradable.
Plastics are polymers, which are large molecules made of many smaller molecules that are typically repeating. Polymers like polypropylene are not abundant in nature, and the enzymes in the microorganisms that break down biodegradable materials do not recognize the bonds that hold polymers together. While plastic will eventually break down into smaller pieces, this process can take hundreds or thousands of years.
In nature, bacteria and insects are usually responsible for degrading materials like wood or food. However, these organisms have not evolved to metabolize plastic, as it is a relatively new material. As a result, plastic waste accumulates in landfills and oceans, releasing toxic chemicals and harmful pollutants into the soil, water, and air.
While biodegradable and compostable plastics are becoming more common, they are not a perfect solution to the plastic pollution crisis. These plastics may not break down as intended if they are not managed properly and end up as litter. Additionally, the production of biodegradable plastics is currently expensive due to the limited availability of the necessary ingredients and the cost of setting up the required equipment.
To address the issue of plastic pollution, it is essential to reduce, reuse, and recycle plastic products whenever possible. Single-use plastics, in particular, have been identified as a major contributor to the pollution crisis, and efforts to ban these products or promote reusable alternatives are crucial in creating a more sustainable future.
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Plastic is made from fossil fuels
Plastic is a product of organic chemistry, made from carbon-based compounds. The most common types of plastics, such as polyethylene and polystyrene, are made from hydrocarbons—substances containing primarily hydrogen and carbon. These are derived from fossil fuels, which are organic in origin.
Chemically, plastic is organic. Its molecules all come from fossil fuels, usually natural gas. Plastic is described as organic because it is made of chains of hydrogen and carbon atoms.
However, plastic is not readily biodegradable. It cannot be decomposed by living organisms because these materials have only existed for a little over a hundred years, and organisms haven't adapted through their evolution to process them.
Because plastic is so durable and so much of it is thrown away, it has become a significant pollutant. Plastic waste gets into the environment and stays there for a long time. Since the 1950s, tons of plastic has been discarded into the environment, and this plastic is likely to persist for many centuries.
The fossil fuel industry is facing a world that is moving towards renewable energy and away from oil and gas due to mounting climate change concerns. Plastic has been called the fossil fuel industry's "Plan B" as it looks for ways to maintain profit margins.
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Frequently asked questions
Plastics are organic molecules. They are made from carbon-based compounds and have a hydrocarbon structure.
Plastics are considered organic because they are made of chains of hydrogen and carbon atoms. The most common types of plastics, such as polyethylene and polystyrene, are made from hydrocarbons.
Plastics are non-biodegradable because they cannot be degraded by insects and bacteria. Plastics have only existed for a hundred years, and organisms haven't evolved to metabolize their components.
Organic compounds contain carbon-hydrogen (C-H) bonds. Inorganic compounds do not contain these bonds and are typically mineral-based.
