Step growth or condensation polymerisation Assignment Help

Assignment Help: >> Mechanism of Polymerisation >> Step growth or condensation polymerisation

Step growth or condensation polymerisation : In this type of polymerisation monomers generally contain two functional sets, i.e., difunctional monomers. In that procedure no initiator is needed and each step is the same type of chemical reaction. Since in that polymerisation reaction the polymer is formed in a stepwise manner. It is defined as step growth polymer and the process is defined as step growth polymerisation. The procedure for two monomer A and B can be expressed as.

            84_condensation polymerisation.png

         Alternatively, step growth can proceed as

            834_condensation polymerisation1.png

         Some general examples of step growth polymers are

Polymers

Monomers

Nylon-66

 adipic acid and Hexamethylenediamine

Bakelite

Phenol and formaldehyde

Dacron (polyester)

Terephthalic acid and ethylene glycol

 

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