Oligomer.pptx

Ppt on Oligomers

1. OLIGOMERS SWAMI VIVEKANAND SUBHARTI UNIVERSITY Presented by : Vikas BSc. Chemistry, 1 st Year, 1 st Sem. Department of Chemistry KVSCOS, SVSU, Meerut Submitted to : Dr. Ankita Agarwal Assistant Professor Department of Chemistry KVSCOS, SVSU, Meerut

2. WHAT IS AN OLIGOMER? An Oligomer is a complex molecule that is made out of a few monomer units. A mmonomer is a molecule that can undergo polymerization in order to form a giant molecule. In order to undergo polymerization, a monomer should have double bond or at least two funnctional groups. However, these monomers are covalently linked to each other in the polymerization process. This process is called Oligomerization. When two monomers are linked, it forms an oligmer called a dimer. When three monomers are linked, it forms a trimer. For four monomers, it is a tetramer. Likewise, we can name the oligomers according to the number of monomers present in those complexes.

3. Oligomers can be made as either homo-oligomers or hetero-oligomers. When identical monomers undergo polymerization, it results in a homo-oligomer . When at least on different monomer undergoes polymerization with these identical monomers, it forms a hetero-oligomer . When considering about the natural oligomers, many oils are oligomeric. Among synthetic oligomers, plasticizers and polybutene are oligomeric complexes.

4. WHAT IS A POLYMER? A Polymer is a macromolecule made out of a large no. of small units called monomers. These monomers are linked to each other via covalent bonds through a process called Polymerization. These polymers have very high masses and densities. They can exist a either linear simple structures or branched complex structures. In the process of polymerization, monomers are linked to each other forming a polymer chain. There are also ceoss links formed between those polymer chains, which results in complex 3D structure. Polymers can be classified based on various parameters due to their complexity. The main parameter that can be used, the the resulting polymer is a homopolymer. If differenttypes of monomers are used, then the resulting polymer is a heteropolymer. Another way to classify polymers is according to their properties. There are three major types of polymers: Thermosetting Polymers , Thermoplastic Polymers and Elastomers .

5. There can be natural poymers and synthetic polymers. Natural polymers include DNA, RNA like polynucleotides, Proteins etc. Synthetic polymers include polymers like PVC, Polystyrene, Polyethylene. Their chemical and physical properties may vary ccording to the type of monomers involved in the process of polymerization and the synthesis of polymers. Furthermore, according to the structure of the polymer, there can be crystalline polymers, semi-crystalline polymers, and Amorphous polymers. A Crystalline polymer has a well-Organized structure whereas amorphous polymers do not have an organized structure. However, amost eery polymer has some degree of amorphous structure. Then they are known as semi-crystalline structures.

6. Similarities Between Oligomer and Polymers Oligomer and Polymer are polymeric structures. The building blocks of both structures are monomers. Monomers are linked together through covalent bonds to form oligomers and polymers

7. Difference between Oligomer an Polymer On the basis of Definition An Oligomer is a complex molecule that is made out of a few monomer units. Oligomer A polymer is a macromolecule made out of a large no. of small unit called Monomers. Polymer

8. On the basis of Process of Formation The process of fomation of an oligomer is called Oligomerization. Oligomer The process of formation of a polymer is a called Polymerization. Polymer

9. On the basis of No. of Monomers Used Oligomerization uses a very less no. of monomers in order to produce an oligomer. Oligomer Polymerization uses a very large no. of monomers in order to produce a polymer. Polymer

10. On the basis of Mass The mass of an oligomer is very less comparatively. Oligomer The mass of a polymer is very high compared to an oligomer. Polymer

11. CONCLUSION Both Oligomers and Polymers are complex molecules that are made out of small units called monomers. These monomers link together via covalent bonds in order to formthese complex molecules. The main difference between oligomer and polymer is that oligomers are formed due to the polymerization of a few no. of monomers whereas polymers are giant molecules formed due to the ploymerizion of a large no. of monomers.

12. THANK YOU