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Addition Polymers -
Formed by repeated addition of monomers having double or triple bonds.
- wherein
Eg:- Polythene (from ethene), Polypropylene (from propane)
Free radical mechanism of Chain growth Polymerisation -
1. Chain initiation step
- Production of free radical
- Addition of this radical to a monomer to produce chain initiating species
2. Chain propagating step
- Formation of another big radical in each repeating step result in growth of polymer
3. Chain termination step
- At some stage when two radicals combine, pairing their unpaired electrons and forming a covalent bond.
- wherein
Given structure is a polymer of the monomer Isobutylene
the monomer is
Isobutylene.
Option 1)
Polyisobutane
Option 2)Polytert - butylene
Option 3)Polysioprene
Option 4)Polyisobutylene