What is the difference between step growth polymerization and chain growth polymerization?

The main difference between chain growth polymerization and step growth polymerization is that the chain growth polymerization involves the growth a polymer chain at its ends whereas the step growth polymerization involves the combination of oligomers to form a polymer chain.

What is the difference between step growth mechanism and chain growth mechanism?

Notice the difference from step growth. In chain growth, the polymer chain always grows one monomer at a time. In step growth, the polymer chain doubles with each step. As a result, the rate of growth of the polymer chain is very different in these two cases.

What are the three main stages of chain growth polymerisation?

Usually an initiator compound reacts with the monomer to start the reaction, and the mechanism of chain polymerization consists of three phases, called initiation, propagation, and termination.

What is meant by step growth polymerization?

Step-growth polymerization refers to a type of polymerization mechanism in which bi-functional or multifunctional monomers react to form first dimers, then trimers, longer oligomers and eventually long chain polymers.

What is step growth polymerization explain the steps involved in this process?

A step growth polymerization refers to a type of polymerization mechanism in which bi-functional or multifunctional monomers form first dimes, then trimers, oligomers and eventually long chain polymers.

What is chain step growth polymerization?

What is the difference between cationic and anionic polymerization?

Anionic polymerization reactions are initiated by an active anionic species, whereas the cationic polymerization reactions are initiated by an active cationic species. This is the key difference between anionic and cationic polymerization. Both these polymerization reactions are sensitive to the solvent used.

What is the difference between cationic and free radical polymerization?

The key difference between free radical and ionic polymerization is that free radical polymerization occurs through radicals that contain an unpaired electron whereas ionic polymerization occurs via ionic species that has no unpaired electrons.

What is characteristic of the process of step growth polymerization?

In a step-growth reaction, the growing chains can react with each other to form longer chains. This holds true for chains of all lengths. But in an addition polymerization, only the monomers can react with growing chains. Two growing chains can’t join together the way they can in a step-growth polymerization.

Which one of the following is made by using step growth polymerization?

Nylon-6,6 is an example of step growth polymer.

What is chain growth?

Chain-growth polymerization. In chain growth polymerization, an activated species (initiator or active center) adds one monomer molecule to create a new active center (propagation step), which again adds another monomer molecule to create another active center and so on, so that the chain growth proceeds as a chemical chain reaction .

What is a step growth polymer?

Step-Growth Polymerization. A step-growth polymerization is a stepwise reaction between bi-functional or mult-ifunctional monomers in which a high-molecular-weight polymer is formed after a large number of steps.

What is an example of an addition polymer?

Examples of such polyolefins are polyethenes, polypropylene , PVC, Teflon , Buna rubbers, polyacrylates , polystyrene , and PCTFE. When two or more types of monomers undergo addition polymerization, the resulting polymer is an addition copolymer.