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Grade: 11
        

Difference between chain growth and step growth polymerization

10 years ago

Answers : (4)

askIITIians Expert
21 Points
							

Differences between chain growth and step growth polymerisation:

Chain growth polymerisation

Step growth polymerisation

*Concentration of monomers disappears early in the reaction.

* Concentration of monomers decreases steadily throughout the reaction

*Reaction is fast and polymer is formed at once.

*The polymer is formed in gradual steps.

*There is very little change in the molecular mass throughout the reaction.

*The molecular mass of polymer increases throughout the reaction.

*Increase in reaction time increases the yield but molecular weight is affected a little.

*Long reaction time is required to get high molecular mass polymer.

*Only one repeating unit is added at a time.

Any two species present can react.

*Reaction mixture contains only a monomer, polymer and growing chain.

*All molecular species are present at any stage.

 

 

10 years ago
Kiran
21 Points
							In chain growth polymerization, the monomer consists of unsaturated covalent bonds.In step growth polymerization, the monomer doesn`t consists of
						
one year ago
Kiran
21 Points
							In chain growth polymerization, the monomer consists of unsaturated covalent bonds.In step growth polymerization, the monomer doesn`t consists of unsaturated covalent bonds.
						
one year ago
Kiran
21 Points
							Stepgrowth polymerisation doesn`t consists of unsaturated covalent bonds. But chain growth polymerization consists of unsaturated covalent bonds.
						
one year ago
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