There are mainly two types of polymerization. Let us check it out both below.
What is Addition polymerization?
It is a reaction that produced a product, which is an exact multiple of the original monomeric molecule.
It is also called a chain polymerization.
- It requires two like molecule.
- Kinetic long linear chain reaction.
- Very fast reaction time.
- The polymer produced thermoplastic.
- Example - Polythene, Orlon
What is Condensation polymerization?
It is a reaction occurring between simple polar group-containing monomers with the formation of polymer and eliminating of small molecules like water and HCL etc.
- It requires two, unlike molecule.
- Intermolecular reaction.
- Slow reaction time.
- Chemo setting plastic produced.
- Example - Decron, Bakelite, Nylon 6
Difference :
- In addition polymerization, only growth reaction adds repeating units one at a time to the chain while in condensation polymerization any two molecular species present can react.
- The number of units decreases steadily throughout the reaction in case of addition polymerization while monomer disappears early in reaction in case of condensation polymerization.
- In case of additional polymerization, a high molecular mass polymer is formed at once, while in the case of condensation polymerization, polymer molecular mass rises steadily throughout the reaction.
- Longer reaction times have a little effect on molecular-weight but give higher yields in case of addition polymerization while in case of condensation polymerization to obtain high molecular-weight and longer reaction time is essential.
- The reaction mixture contains only monomers, high polymers and about 10-8part of growing chains in case of addition polymerization while all type of molecular species is present at any stage in case of condensation polymerization.