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Step-growth polymerizationChain-growth polymerizationGrowth throughout matrixGrowth by addition of monomer only at one end of chainRapid loss of monomer early in the reactionSome monomer remains even at long reaction timesSame mechanism throughoutDifferent mechanisms operate at different stages of reaction (i.e. Initiation, propagation and termination)Average molecular weight increases slowly at low conversion and high extents of reaction are required to obtain high chain lengthMolar mass of backbone chain increases rapidly at early stage and remains approximately the same throughout the polymerizationEnds remain active (no termination)Chains not active after terminationNo initiator necessaryInitiator required
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What is the reaction that links monomers to form a chain?
Polymerization is the reaction that links monomers to form a chain. This process involves the repetitive bonding of monomer units to form a longer chain molecule known as a polymer.
What is the chemical reaction by which monomers are linked together to form polymers?
The chemical reaction that links monomers together to form polymers is called polymerization. During polymerization, monomers undergo a process where their chemical bonds are broken and new bonds are formed between the monomer units, resulting in a chain-like structure of repeating units known as a polymer. This process can be initiated by heat, light, or the addition of a catalyst.
What chemical reaction formed these large molecules?
Large organic molecules (macromolecules) are generally formed by condensation reactions between smaller molecules.Condensation means that a small molecule is formed from the atoms removed during the reaction. In cells, the small molecule is water, so the type of condensation reaction is dehydration.Examples:glucose + (chain of n glucose residues) forms chain of n + 1 residues + wateramino acid + (chain of n amino acid residues) forms chain of n + 1 residues + water
What is chain termination?
Chain termination is any chemical reaction leading to the destruction of a reactive intermediate in a chain propagation step in the course of a polymerization, effectively bringing it to a halt.
Is the polymerization of polylactic acid addition or condensation?
The polymerization of polylactic acid is a condensation polymerization process. It occurs when the lactic acid monomers undergo a condensation reaction, releasing water as a byproduct to form the polymer chain.
What are the differences between additional polymerization and condensation polymerization?
the structural unit of step reaction polymerization are chemically identical to the monomer employed in the reaction while those of the chain reaction may or may not be identical addition or step polymers take their names from their starting monomers while those of the chain reaction is not so
What is the reaction that links monomers to form a chain?
Polymerization is the reaction that links monomers to form a chain. This process involves the repetitive bonding of monomer units to form a longer chain molecule known as a polymer.
What is the name of a reaction that links monomers to form a chain?
Polymerization .
What reaction adds monomers to a growing polymer chain?
Such reactions are known as polymerization processes, they are of two types 1- addition polymerization and 2- condensation polymerization.
What is the name for a reaction that links monomers to form a food chain?
The process of linking monomers to form a food chain is known as polymerization. This involves the chemical reaction that combines monomers to form larger molecular structures called polymers, such as proteins, carbohydrates, and nucleic acids.
What is the chemical reaction by which monomers are linked together to form polymers?
The chemical reaction that links monomers together to form polymers is called polymerization. During polymerization, monomers undergo a process where their chemical bonds are broken and new bonds are formed between the monomer units, resulting in a chain-like structure of repeating units known as a polymer. This process can be initiated by heat, light, or the addition of a catalyst.
What chemical reaction formed these large molecules?
Large organic molecules (macromolecules) are generally formed by condensation reactions between smaller molecules.Condensation means that a small molecule is formed from the atoms removed during the reaction. In cells, the small molecule is water, so the type of condensation reaction is dehydration.Examples:glucose + (chain of n glucose residues) forms chain of n + 1 residues + wateramino acid + (chain of n amino acid residues) forms chain of n + 1 residues + water
What is chain termination?
Chain termination is any chemical reaction leading to the destruction of a reactive intermediate in a chain propagation step in the course of a polymerization, effectively bringing it to a halt.
How a chain terminate by coupling in polythene?
A chain in polythene can terminate by coupling through a reaction that involves the joining of two polymer chains. This coupling reaction can occur during the polymerization process or be induced post-polymerization through the use of coupling agents. Termination by coupling can lead to the formation of branched or cross-linked structures, altering the properties of the polythene material.
Is the polymerization of polylactic acid addition or condensation?
The polymerization of polylactic acid is a condensation polymerization process. It occurs when the lactic acid monomers undergo a condensation reaction, releasing water as a byproduct to form the polymer chain.
What the differences between ring-opening polymerization and ring-opening metathesis polymerization?
Ring-opening polymerization involves the opening of cyclic monomers with formation of linear polymer chains, while ring-opening metathesis polymerization involves the redistribution of double bonds in cyclic monomers to form a polymer chain. Ring-opening polymerization can use a variety of monomers, whereas ring-opening metathesis polymerization is typically limited to cyclic olefins. Additionally, ring-opening polymerization relies on nucleophilic or electrophilic initiators, while ring-opening metathesis polymerization relies on metal catalysts.
What reaction causes a polymer?
A reaction that results in the synthesis of polymers from a quantity of a single corresponding monomer is usually called "polymerization", and if there are two or more monomers that can combine with themselves as well as with each other, the reaction is better called "copolymerization". However, if there is more than one monomer and the chemical nature of the polymerization requires that the monomers alternate with each other, as in phenol-formaldehyde resins, the reaction is usually called a "condensation" reaction. It is also possible to synthesize polymers by reacting a different polymer, as in "polyvinylalcohol", which is made by hydrolyzing a polyvinyl ester, since the notional "vinyl alcohol" monomer is too unstable to use directly.
