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9.4 Synthetic 
Polymers
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9.4 Synthetic 
Polymers
Page 3


9.4 Synthetic 
Polymers
Page 4


9.4 Synthetic 
Polymers
?Polymers are large molecules made up of 
many smaller and identical repeating units 
joined together by covalent bonds . These 
molecules are called monomers .
?Polymerisation is the chemical process by 
which the monomers are joined together to 
form a big molecule known as a polymer . 
?A polymer is a macromolecules (a very big 
molecules) . Hence , the relative molecular 
mass of a polymer is large .
?The properties of a polymer are different from 
its monomers .
Page 5


9.4 Synthetic 
Polymers
?Polymers are large molecules made up of 
many smaller and identical repeating units 
joined together by covalent bonds . These 
molecules are called monomers .
?Polymerisation is the chemical process by 
which the monomers are joined together to 
form a big molecule known as a polymer . 
?A polymer is a macromolecules (a very big 
molecules) . Hence , the relative molecular 
mass of a polymer is large .
?The properties of a polymer are different from 
its monomers .
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FAQs on PPT - Polymers and Their Properties - Chemical Technology - Chemical Engineering

1. What are polymers and how do they differ from other types of chemicals?
Ans. Polymers are large molecules made up of repeating subunits called monomers. They are different from other chemicals because of their high molecular weight and complex structure. Unlike small molecules, polymers have unique properties such as flexibility, strength, and durability, which make them suitable for various applications in industries like chemical engineering.
2. What are some common properties of polymers?
Ans. Polymers exhibit a wide range of properties depending on their composition and structure. Some common properties of polymers include high tensile strength, good thermal stability, low density, excellent electrical insulation, and resistance to chemicals and environmental factors. These properties make polymers versatile materials that can be used in various fields, including manufacturing, packaging, and biomedical applications.
3. How are polymers synthesized in chemical engineering?
Ans. Polymers can be synthesized through different methods in chemical engineering. One common method is polymerization, where monomers are chemically bonded together to form a polymer chain. This can be achieved through processes such as addition polymerization, condensation polymerization, or ring-opening polymerization. Another method is by modifying existing polymers through techniques like copolymerization or cross-linking, which enhance their properties or create new ones.
4. What factors influence the properties of polymers?
Ans. Several factors influence the properties of polymers. Firstly, the choice of monomers and their chemical structure greatly affects the properties of the resulting polymer. The molecular weight and degree of polymerization also play a role, as higher molecular weight polymers tend to have increased strength and viscosity. Additionally, factors like temperature, pressure, and the presence of additives or fillers can alter the properties of polymers.
5. What are some applications of polymers in chemical engineering?
Ans. Polymers find extensive applications in chemical engineering. They are used in the production of plastics, fibers, coatings, adhesives, and composite materials. In the field of energy, polymers are utilized in fuel cells, solar cells, and batteries. In biomedical engineering, polymers are employed in drug delivery systems, tissue engineering, and medical implants. Overall, the versatility and unique properties of polymers make them indispensable in various sectors of chemical engineering.
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