Classification of Polymers and Polymerisation Methods What is a polymer? A polymer is a long chain of molecules made of repeated units. Polymers can be...
Classification of Polymers and Polymerisation Methods
What is a polymer?
A polymer is a long chain of molecules made of repeated units. Polymers can be synthetic or natural. Synthetic polymers are produced by humans, while natural polymers are found in nature. Polymers have a wide range of properties, including strength, flexibility, and solubility.
How are polymers classified?
Polymers can be classified based on their molecular weight, molecular structure, and chemical composition.
By molecular weight: Polymers are typically classified by their molecular weight. The molecular weight is the sum of the atomic weights of all the atoms in the polymer molecule. Polymer molecules with a higher molecular weight are more complex.
By molecular structure: Polymers can also be classified by their molecular structure. The molecular structure is the arrangement of atoms in the polymer molecule. Polymer molecules with a regular molecular structure are more likely to be crystalline, while those with a irregular molecular structure are more likely to be amorphous.
By chemical composition: Polymers can also be classified by their chemical composition. Polymers can be made from a variety of materials, including metals, plastics, and organic matter.
How are polymers manufactured?
Polymerisation is the process of creating polymers from raw materials. Polymerisation can be carried out by a variety of methods, including:
Chemical polymerisation: In chemical polymerisation, monomers (small molecules) are combined to form polymers. The monomers are typically heated or mixed with a catalyst.
Physical polymerisation: In physical polymerisation, polymers are formed by the cooling or freezing of a polymer solution or suspension.
Emulsion polymerisation: In emulsion polymerisation, a polymer is dispersed in a liquid emulsion. The emulsion is then polymerised to form a polymer film.
What are the different applications of polymers?
Polymers have a wide range of applications, including:
Building materials: Polymers are used to build buildings, bridges, and other structures.
Transportation: Polymers are used to manufacture tires, plastics, and other automotive parts.
Medical devices: Polymers are used to manufacture medical devices such as implants, sutures, and contact lenses.
Consumer products: Polymers are used to manufacture a wide range of consumer products, including clothing, food packaging, and toys.
Environmental protection: Polymers can be used to remove pollutants from water and air