Among the polymers, which one is generally prepared by cationic polymerization?

Options

A. Polymerization
B. Teflon
C. Orlon
D. Polypropylene

Answer

A

Explanation

When the initiator is cationic in nature (such as `H^(+)` from an acid), on addition to the double bond, it would generates a cationic intermediate for propagating the addition chian process which is called cationic intermediate for propagating the addition chain process which is called cationic addition polymerization.
Cationic polymerization is facilitated in monomers containing electron-releasing groups. Thus isoutylene undergoes cationic polymerization easily as it has two electron releasing `-CH_(3)` groups that will stabilize the intermediate tertiary carbocation:
Orlon or acrilan is derived from acrylonitrile,
`CH_(2) CH - CN` which has an electron withdrawing `CN` group. Teflon is derived from tetraflucoroethene which has electron withdawing `F` atoms. Polypropylene is derived from propylene `CH_(3) = CH_(2)` which has just one electron releasing methyl group.