( iii) Anionic polymerisation It involves formation of a carbanion, Steps involved in this process are
Step I Initiation Strong bases act as initiator.
Step Growth Polymerisation
Condensation polymerisation which occurs in a stepwise manner with elimination of some smaller molecules like H2O, NH3, HCI, ROH, etc., is concerned with step growth polymerisation, e. g., adipic acid and hexamethylenediamine phenol and formaldehyde etc., undergo step Growth Polymerisation.
Distinction Between Chain Growth Polymerisation and Step Growth Polymerisation