Classification, Addition & Condensation Polymerization, Copolymers & Commercial Polymers - Chemistry | Agrigyan

Classification of the polymers:

• Bakelite (A): Formed by step-growth condensation of phenol and formaldehyde with loss of water molecules $\rightarrow$ Condensation polymer.
• Teflon (B): Formed by chain-growth addition polymerisation of tetrafluoroethene $\rightarrow$ Addition polymer.
• Melamine formaldehyde resin (C): Formed by condensation polymerisation of melamine and formaldehyde with elimination of water $\rightarrow$ Condensation polymer.
• Nylon-2 nylon-6 (D): Biodegradable copolymer formed by condensation polymerisation of glycine and amino caproic acid $\rightarrow$ Condensation polymer.
• Buna-S (E): Formed by addition copolymerisation of 1,3-butadiene and styrene $\rightarrow$ Addition polymer.

Nylon 6 is obtained by heating caprolactam with water at a high temperature ($533 - 543\text{ K}$):

Nylon 6,6 is made from adipic acid and hexamethylenediamine, while Dacron (terylene) is made from ethylene glycol and terephthalic acid.

Definitions:

• homopolymer is formed from a single monomeric species.
• copolymer is formed by the polymerisation of two or more different monomers.
  Analysis of options:
• Polypropene is a homopolymer of propene.
• Polystyrene is a homopolymer of styrene.
• Polyvinyl chloride (PVC) is a homopolymer of vinyl chloride.
• Glyptal is a copolymer synthesized by condensation polymerisation of two different monomers: ethylene glycol and phthalic acid.