Classification of Polymers — Definition
Definition
Imagine tiny building blocks, each called a 'monomer'. Now, imagine linking hundreds or thousands of these identical or similar building blocks together in a long chain. What you get is a giant molecule, a 'macromolecule', which we call a 'polymer'. The word 'polymer' comes from Greek: 'poly' meaning many, and 'meros' meaning parts or units. So, a polymer is essentially 'many parts' linked together. The process of forming these long chains from individual monomers is known as 'polymerization'.
Why do we need to classify these amazing materials? Just like we classify animals into mammals, birds, reptiles, etc., based on their characteristics, we classify polymers because they are incredibly diverse.
They can be found in nature (like the proteins in your body or the cellulose in plants), or they can be made in laboratories (like plastics and synthetic rubber). They can be soft and stretchy, hard and rigid, or even form strong fibers.
To make sense of this vast world of polymers and to study them systematically, scientists have developed several ways to classify them.
These classifications are not just academic exercises; they are crucial for understanding why a certain polymer behaves the way it does and what it can be used for. For example, knowing if a polymer is a 'thermoplastic' tells us it can be melted and reshaped, making it ideal for recycling plastic bottles.
Knowing if it's a 'fiber' tells us it's strong and can be woven into textiles. Similarly, understanding its 'source' (natural or synthetic) helps us appreciate its origin and environmental impact.
In essence, classifying polymers is like creating a detailed map of a complex city. Each classification category (like 'source', 'structure', 'mode of polymerization', 'molecular forces', 'monomers', and 'biodegradability') acts as a different filter or lens through which we can view and understand these materials.
This systematic approach simplifies their study, helps in predicting their properties, and guides their application in countless aspects of our lives, from the clothes we wear to the medical implants that save lives.