Question

Polymers having ester linkage are known as?

Answer 1

Polymers can be defined as a class of molecules which could be natural or synthetic and composes of a large number of repeated units called monomers.On the basis of various parameters,polymers can be further classified into different groups.Factors like branching in monomer chain,cross-linking bonds and presence of functional groups affect the chemical properties of polymers to a very great extent.

Complete answer: When a large number of monomers come together and chemically react with each other we get polymers.On the basis of origin,molecular force etc we can classify polymers.
A)On the basis of origin of monomer
i)Natural polymers-The monomers are naturally sourced.
ii)Semi-synthetic polymers-The monomers are partially organic and synthetic.
iii)Synthetic polymers-The monomers are synthesized in laboratories.
B)On the basis of origin of Structure
i)Linear polymers-The monomers are linked in a linear structure.
ii)Branched polymers-The monomer chain shows branching at few places.
iii)Cross-Linked polymers-The monomer chains are interlinked to each other.
C)On the basis of origin of Structure
i)Elastomer
ii)Fibre
iii)Thermoplastic-Moldable at certain high temperatures
iv)Thermosetting-Becomes irreversibly hard on heating
D)Based on mode of polymerisation
i)Addition polymerisation-Formed using addition polymerisation .
ii)Condensation polymerisation-Formed using condensation polymerisation.
Further polymers can also be modified to suit various needs.The polymers which show ester linkage are known as Polyesters.

Note:
Polyesters are formed by condensation polymerisation between di-carboxylic acid and di-hydric alcohol.The individual units are held together by ester linkages.Polyesters are one of the most used polymers.They are used extensively in the production for insulation for electric wires.Many footwear companies are also experimenting with footwear made using polyesters.