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Examples of Polymers With Monomers- Examples of Condensation Polymers & Examples of Addition Polymers

Examples of Polymers With Monomers- Examples of Condensation Polymers & Examples of Addition Polymers

We often call a painter to paint the house whenever it's necessary. But do you know what are the ingredients for paint? Glyptal, which is a polymer made by a combination of different smaller units known as monomers due to its binding nature, is used in the manufacturing of paint. Take Teflon for example. Do you know where Teflon is used? You must have observed a black coating on the non-stick pans in the kitchen. That black coating is made up of Teflon which is thermal and oil resistant. Teflon again is a polymer of tetra fluoroethene. If you see you will find yourself surrounded by polymers. There are a large number of polymers which find their applications in different industries like aerospace industries, automotive industries, and textile industries to name a few. Now, let’s learn about such essential polymers and the monomeric units required for their formation


Table of content

Examples of condensation polymers 

1. Terylene: It is an example of a condensation polymer which is formed by the polymerisation of ethylene glycol [OH-(CH2)2-OH] and terephthalic acid [HOOC - C6H4 - COOH]. 


2. Glyptal: The condensation polymerisation of phthalic acid and ethylene glycol gives glyptal.


3. Nylon-6,6: The condensation polymerisation of hexamethylenediamine and adipic acid gives Nylon-6,6.


4. Nylon-6,10: The condensation polymerisation of hexamethylenediamine (1,6-hexanediamine) and sebacoyl chloride gives Nylon-6,10.


5. Nylon-6: It is obtained by heating caprolactam at a temperature of 533 K to 543 K. Nylon-6 is also called Perlon-L.


6. Melmac: It is formed by the condensation polymerisation of melamine and formaldehyde.


7. Polyurethanes: The reaction of isocyanates with alcohols gives urethanes, which are carbamate esters. When diols react with diisocyanates, polyurethanes are obtained.




11. Poly-3-hydroxybutyrate-co-3-hydroxy valerate (PHBV): It is obtained by the condensation copolymerisation of 3-hydroxybutanoic acid and 3-hydroxypentanoic acid. 


12. Phenol-formaldehyde resins

 Different polymers can be formed by the polymerisation of phenol and formaldehyde.


  • Novolac (or) Resol: It is formed by condensation polymerisation of phenol or substituted phenol with formaldehyde.

  • Bakelite: It is a condensation polymer made up of phenol and formaldehyde monomers. It is also known as polyoxybenzyl methylene glycol anhydride



Examples of addition polymers

1. Teflon: It is an addition polymer made up by combining tetrafluoroethylene at high pressure in the presence of a persulphate catalyst. It is also known as polytetrafluoroethylene (PTFE). 


2. Polyethylene: It is an addition polymer which is made up of combining ethene at high pressure and high temperature in the presence of catalyst depending on the type of polyethene to be prepared.


 3. Polyacrylonitrile:  It is an additional polymer which is made up by combining acrylonitrile in the presence of peroxide catalyst. It is also known as orlon.


 4. Natural rubber: Natural rubber is an addition polymer of isoprene(2-methyl-1,3-butadiene) with a chemical formula (C5H8) is joined together forming long chain polymer cis-1,4-polyisoprene which is also known as natural rubber.


 5. Gutta-percha: Gutta-Percha is the trans isomer of polyisoprene. 


 6. Neoprene: It is obtained by the free-radical polymerisation of chloroprene, which is an example of addition polymerisation.


 7. Buna-N: It is obtained by the copolymerisation of 1,3 butadiene and acrylonitrile in the presence of sodium catalyst and at high temperature.


8. Buna-S: It is obtained by the copolymerisation of 1,3 butadiene and styrene in the presence of sodium catalyst and at high temperature.


9. Polystyrene: It is obtained by the polymerisation of styrene from a free radical mechanism. 


Practice problems

 Q 1. Select the correct option for the monomer required for the formation of polyacrylonitrile (PAN).

a. Styrene and 1,3 butadiene
b. Acrylonitrile and 1,3 butadiene
c. Acrylonitrile 
d. Chloroprene

Answer: (C)

Monomer of polyacrylonitrile (PAN) is Acrylonitrile. PAN is formed by addition polymerisation of acrylotrile.


Q 2. The monomer of natural rubber is: 

a. Isoprene
b. Glycine and aminocaproic acid
c. Phenol and formaldehyde
d. Styrene and 1,3 butadiene

Answer: (A)

Natural rubber is a polymer of isoprene (2-methyl-1,3-butadiene). Whereas, glycerine and aminocaproic acid form (Nylon-2, Nylon-6) polymer. Phenol and formaldehyde form bakelite. Styrene and 1,3 butadiene together form Buna-S.




Q 3. Which of the following polymer is an example of a condensation polymer?

a. Natural rubber
b. Gutta Percha
c. Terylene
d. Teflon

Answer: (C)

Natural rubber, Gutta Percha and Teflon are examples of addition polymers. 

Terylene is obtained by condensation polymerisation of ethylene glycol [OH-(CH2)2-OH] and terephthalic acid [HOOC - C6H4 - COOH]. 


Q 4. Which of the following polymer have the same monomeric units?

a. Novolac and Buna-
b. Bakelite and Buna-N
c. Bakelite and Novolac
d. Polyethylene and Teflon

Answer: (C)

Monomers of Novolac: Phenol and Formaldehyde
Monomers of Buna-S: 1,3 butadiene and styrene
Monomers of Bakelite: Phenol and Formaldehyde
Monomers of Buna-N: 1,3 butadiene and acrylonitrile
Monomer of Polyethylene: Ethene
Monomer of Teflon: Tetrafluoroethylene 
So, both Novolac and Bakelite have same monomeric units i.e; Phenol and Formaldehyde

Frequently Asked Questions-FAQs

Q 1. Which properties of a polymer are useful in manufacturing different varieties of products?
Answer: Some important uses of the polymer include the manufacturing of switches, non-stick cookware, mugs, baskets, pipes tubes, fabrics etc. Due to its properties like tensile strength, resistance to chemicals, thermal resistance, electrical resistance, lightweight, resistance to moisture etc. 

Q 2. What are monomers? Give some examples of monomers. 
Answer: Monomers are smaller units having a low molecular mass that combine together with a large number of such molecules to form large aggregate units called polymers and the process is known as polymerisation. A few examples of monomers are- isoprene, styrene, ethene, chloroprene etc.

Q 3. What is the monomer of protein? What is its importance? 
Answer: Protein is a polymer which is made by combining a large number of smaller molecules known as amino acids which are the monomeric units. Protein plays an important role in the growth of the body and also plays an important role in metabolism, DNA replication etc

Q 4. What are biodegradable and non-biodegradable polymers?
Answer: Biodegradable polymers are those polymers which can be broken down into simpler units of microorganisms and enzymes. For example- poly--hydroxybutyrate-co--hydroxy valerate(PHBV). Whereas, nonbiodegradable polymers are those polymers which cannot be decomposed into simpler units with the help of microorganisms.

Related topics

Classification of polymer

Condensation polymerisation

Use Of Polymer

Biodegradable Polymer

Molecular mass of polymer

Rubber

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