How many types of polymers molecular structures Define each

How many types of polymers molecular structures? Define each one?

Solution

There are four types of structures in polymers
1.Linear Polymers
2.Branched Polymers
3.Cross-linked Polymers
4.Network Polymers

1.Linear Polymers: Linear Polymers: Linear polymers are those in which the mer (the group of atoms that constitutes a polymer chain repeat unit) units are joined together end to end in single chain.

2.Branched Polymers: Polymers may be synthesized in which side-branch chains are connected to the main ones. These are called branched polymers. The branches, considered to be the part of the main-chain molecules result from side reactions that occur during the synthesis of the polymer.

3.Cross-linked Polymers: In cross linked polymers, adjacent linear chains are joined one to another at various positions by covalent bonds. The process of cross linking is achieved either during synthesis or by a nonreversible chemical reaction that is usually carried out at an elevated temperature.

4.Network Polymers: Trifunctional mer units, having three active covalent bonds, form three-dimensional networks instead of the linear chain framework assumed by bifunctional mers. Polymers composed of a trifunctional units are termed network polymers.