Practicing Success
Case: Read the passage and answer the following questions There are two broad types of polymerisation reactions, i.e., the addition or chain growth polymerisation and condensation or step-growth polymerisation. In chain-growth polymerisation, the molecules of the same monomer or different monomers add together on a large scale to form a polymer. This type of polymerisation is explained free radicle mechanism. Some important addition polymers are polythene and teflon. Condensation polymerisation or step-growth polymerisation generally involves a repetitive condensation reaction between two bi-functional or trifunctional monomeric units. Some important condensation polymers are nylon, Bakelite, and formaldehyde polymer. Copolymerisation is a polymerisation reaction in which a mixture of more than one monomeric species is allowed to polymerise and form a copolymer. Rubber and its derivatives are copolymers. |
Nylon 6, 6 is obtained by condensation polymerisation of; |
Adipic acid and phenol Adipic acid and ethylene glycol Adipic acid and hexamethylenediamine Adipic acid and formaldehyde |
Adipic acid and hexamethylenediamine |
Nylon 6,6 is obtained by condensation polymerisation of adipic acid and hexamethylenediamine, Nylon 6, 6 is used in making sheets, bristles for brushes and in the textile industry. |