photo.jpg

## Classification of Polymer ### Classification of Polymer **** - On the basis of monomer - Homopolymer - Whenever polymer consists of all identical monomers are known as homo-polymers. - e.g. Polyethylene, Polystyrene - Copolymer - Whenever polymer consists of m...

## Classification of Polymer ### Classification of Polymer **** - On the basis of monomer - Homopolymer - Whenever polymer consists of all identical monomers are known as homo-polymers. - e.g. Polyethylene, Polystyrene - Copolymer - Whenever polymer consists of monomers of different chemical structure are known as copolymers. - e.g. Styrene butadiene rubber. - On the basis of Molecular structure - In polymers, the monomeric units are possessing either linear, branched or cross-linked (three-dimensional) structure. - If the constituent monomer have two links (-M-) in their structure then each of these - On the basis of thermal behaviour - Thermosoftening - Thermosetting ## Polymerization ### Polymerization - Polymerization is the process of uniting or linking together, a large number of small molecules (monomers) to form a large molecule (polymer) under specific conditions of temperature, pressure and catalyst is known as polymerization". - The word polymer means "many parts". It is obtained by combination of two words, poly means "many" and "mers" means "units or parts". - Polymers are made up of large number of small molecules called monomers. Hence, hundreds or thousands of monomers joined together to form large molecule in a polymer.