What is the difference between addition and condensation polymerization

During the reaction, unsaturated bonds open up and form covalent bonds with adjacent monomer molecules to form long chain polymers. There are three types of mechanisms in addition polymerisation, namely; free-radical mechanism, ionic mechanism, co-ordination mechanism. Polymers produced by the addition polymerisation process are called addition polymers. Condensation polymerisation is the process of intermolecular condensation of two different monomers to form a large chain of polymer molecules.

In this process, linking of every two monomer molecules will result in a simple molecule such as HCl, ammonia, water, etc. Hence, the molecular weight of the polymer will be the product of the degree of polymerisation and the molecular weight of the repeating unit. The polymers resulted due to condensation polymerisation are called condensation polymers. Bakelite, nylon and polyester are some common examples of condensation polymers. The reaction of 1,4-phenyl-diamine para-phenylenediamine and terephthaloyl chloride to produce Aramid.

Addition polymerisation: Monomer must have at least a double or triple bond. Condensation polymerisation: Monomer must have at least two similar or different functional groups. Addition polymerisation: Addition of monomer results in a polymer. Condensation polymerisation: Monomers condense to give a polymer. Addition polymerisation: The reaction results in high molecular weight polymers at once.

Condensation polymerisation: The molecular weight of the polymer increases steadily with the reaction. Addition polymerisation: Longer reaction time results in higher yields, but has a minute effect on the molecular weight of the polymer. Condensation polymerisation: Longer reaction times are crucial to obtain higher molecular weight of polymers.

If monomers have double bonds between the carbons, polymers are also formed via polymerization. In some polymerization reactions, when two monomers combine, a small molecule is released, that is, water. Such polymers are condensation polymers. Polymers have very different physical and chemical properties compared to their monomers. When a single molecule or unit forms a polymer by mutual additive reaction, this process is called addition polymerization.

What are smart polymers used for? Smart polymers appear in highly specialised applications and everyday products alike. They are used for sensors and actuators such as artificial muscles , the production of hydrogels, biodegradable packaging, and to a great extent in biomedical engineering. Is Pan an addition polymer? The polymerization of PAN is a free radical addition polymerization initiated by such materials as azobis isobutyronitrile , benzoyl peroxide and persulfates.

Comonomers are frequently used to enhance solubility in spinning solvents such as dimethylformamide and the dyeability of fibers. Which type of monomer is most likely to form a condensation polymer? Condensation polymerization is a form of step-growth polymerization.

Linear polymers are produced from bifunctional monomers, i. Common condensation polymers include polyamides, polyacetals, and proteins. Will synthetic polymers always have to be made from crude oil? Yes, because although other technologies exist, they are too costly for large scale use. How are monomers and polymers related?

Monomers are small molecules, mostly organic, that can join with other similar molecules to form very large molecules, or polymers. All monomers have the capacity to form chemical bonds to at least two other monomer molecules. Polymers are chains with an unspecified number of monomeric units. Why is polymerization important? Polymerization is important because it is how plastics are made and many of our products contain plastics.

Polymerization is also how your body makes proteins. Can polymerization be reversed?