Phase Change Polymer (PCP) are the most required environment sustainable mechanism to conserve not only energy but also reduce the carbon footprint. PCP have a wide variety of applications and the degree of intensity and technology establishes the road map PCP can provide the right step ahead towards energy conservation and environmental sustainability. Phase Change polymersare produced by step growth polymerization and condensation polymerization. Step growth polymers are defined as polymers formed by stepwise polymerization between functional/bi-functional/tri-functional group of polymers which  also contain hetro atoms. Step growth polymers increase in Molecular weight at a very slow rate at lower conversion and reach moderately low molecular weight at very high conversion.

A condensation polymer is defined as a polymer that involves loss of some condensate and / or contains hetro atoms as part of its back bone chain and its repeat unit does not contain all atoms present in hypothetical monomer to which it can be degraded. In both the process of making Base Polymer and Co- Polymer various other additives like anti oxidants and others are used to control the character and property of the products.