How does degree of polymerization affect the melting point?
In general, increasing degree of polymerization correlates with higher melting temperature and higher mechanical strength.
What are long chains formed by the process of polymerization?
Answer. Answer: Polymerization, any process in which relatively small molecules, called monomers, combine chemically to produce a very large chainlike or network molecule, called a polymer.
What is chain transfer in chain growth polymerization?
Chain transfer is a polymerization reaction by which the activity of a growing polymer chain is transferred to another molecule. P• + XR’ → PX + R’• Chain transfer reactions reduce the average molecular weight of the final polymer.
What happens in 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 reaction polymerization?
Step‐reaction polymerization is one of the two principal classifications of the mechanism of the growth reaction in polymerization. In step‐reaction polymerization the growth reaction proceeds by combination of monomer, oligomer, or polymer molecules with other monomer, oligomer, or polymer molecules.
What are two methods of polymerization?
Polymerization Reactions The chemical reaction in which high molecular mass molecules are formed from monomers is known as polymerization. There are two basic types of polymerization, chain-reaction (or addition) and step-reaction (or condensation) polymerization.
What happens during polymerisation?
Polymerisation is the reaction of monomer molecules to form long chain polymer molecules. A monomer is a small reactive molecule that can be joined with other monomers to form long chains. These long chain molecules can be made up from tens of thousands of monomers joined together.
What is the most important polymer?
By far the most important industrial polymers (for example, virtually all the commodity plastics) are polymerized olefins. Olefins are hydrocarbons (compounds containing hydrogen [H] and carbon [C]) whose molecules contain a pair of carbon atoms linked together by a double bond.
Is Bakelite a natural polymer?
Most of the things that we use are made up of synthetic polymers. Some typical examples of synthetic polymers are polyethylene, polyvinyl chloride, Bakelite, nylon, synthetic rubbers. On the other hand, we have high-density polyethene which is also chemically inert. It is highly crystalline in nature.
Is Salt a polymer?
Salt is not a polymer. Common table salt is sodium chloride, which is an ionic complex.