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Multiple choice synthetic polyamides polymerisation chemistry

Which of the following is used in making textiles and ropes?

  1. Dacron

  2. Perlon - L

  3. Rayon

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Perlon-L is also known as nylon-$6$. It is obtained by heating caprolactum with water at a high temperature. It is used in making textiles and ropes.

Multiple choice synthetic polyamides polymerisation chemistry

Which of the following is the biodegradable polymer?

  1. $PHBV$
  2. $Nylon-6,6$
  3. $Nylon-6$
  4. $all$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

PHBV is common name of Poly $(3-hydroxybutyrate-co-3-hydroxy$ $valerate)$ which is biodegradable, non-toxic, bi compatible plastic produced naturally by bacteria. It is a thermoplastic linear aliphatic polyester.

Multiple choice synthetic polyamides polymerisation chemistry

Inter-particle forces present in Nylon-6,6 are 

  1. van der Waals

  2. hydrogen bonding

  3. dipole-dipole interactions

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nylon 6,6 chains are held together by strong intermolecular hydrogen bonding between the carbonyl oxygen of one chain and the amide hydrogen of another.

Multiple choice synthetic polyamides polymerisation chemistry

Inter-particle forces present in Nylon-6,6 are

  1. van der Waals

  2. hydrogen bonding

  3. dipole-dipole interactions

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nylon 6,6 chains are held together by strong intermolecular hydrogen bonding between the carbonyl oxygen of one chain and the amide hydrogen of another.

Multiple choice synthetic polyamides polymerisation chemistry

Which of the following statements are correct about Nylon - $6,: 6$ ?

  1. Nylon fibers have higher tensile strength than teylene fibres.

  2. Nylon fibers have lower tensile strength than terylene fibres.

  3. In nylon, there is strong intermolecular H-bonding, while in terylene there is weak dipole-dipole interaction.

  4. In nylon, there is weak dipole-dipole interaction, while in terylene there is strong intermolecular H-bonding.
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

Nylon - $6,:6$ has high mechanical strength and superior resistance to wear and organic chemicals.
It has more than double the strength and stiffness of unreinforced nylon.
Nylon has $-NH-CO-$ bond which results in intermolecular H-bonding.
Terlyene has no H-bonding and has only weak dipole-dipole interactions and hence, nylon - $6,:6$ has higher tensile strength compared to that of terylene.

Multiple choice synthetic polyamides polymerisation chemistry

Which of the following is a common example of fibers?

  1. Bakelite

  2. Buna-S
  3. Nylon - $6,\: 6$
  4. Nylon - $6$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nylon-6,6 (PA66) is semicrystalline polyamide commonly used in fiber applications such as carpeting, clothing, and tire cord. 


It is also used as an engineering material in bearings and gears due to its good abrasion resistance and self-lubricating properties. 

Multiple choice synthetic polyamides polymerisation chemistry

The compound with which hexamethylene diamine on polymerization gives nylon-6,6 is:

  1. citric acid

  2. adipic acid

  3. oxalic acid

  4. tartaric acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid, which give nylon 66 its name.


$n HOOC-{(CH _2)} _4-COOH + n H _2N-{(CH _2)} _6-NH _2$ 
$\rightarrow [-OC-{( CH _2)} _4-CO-NH-{(CH _2)} _6-NH-] _n + 2n H _2O$

Multiple choice synthetic polyamides polymerisation chemistry

In which of the following polymer, monomer is not aromatic?

  1. Perlon - L

  2. Polyvinyl pyrrolidone

  3. PTFE

  4. Neoprene
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation

Porlon-L is a polyamide and a linear non-aromatic structure.

Neoprene is formed by monomer prepared by addition mechanism. PTFE and polyvinyl pyrrolidone also have non-aromatic monomer.

Multiple choice synthetic polyamides polymerisation chemistry

Which factor imparts the crystalline nature to a polymer like nylon?

  1. Strong intermolecular forces like hydrogen bonding between chains.

  2. Van der Waals forces between the polymeric chains.

  3. Close packing of the chains due to ionic bonding between the chains.

  4. Three-dimensional network of chains.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

in nylon, there is strong intermolecular hydrogen bonding between hexamethylene di ammine and di adipic acid,

the nylon is used in making sheets, bristles for brushes and in the textile industry.
so the correct option is [A].