write the short note on ring opening reaction with suitable examples?
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Some examples of cyclic monomers that polymerize through anionic or cationic ring-opening polymerization include cyclic ethers, lactones, lactams, carbonates, aziridines, and epoxides. Ring-opening polymerization can also proceed via free radical polymerization.
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The following are the properties of ring-opening reactions:
- The most recent and common role of ring-opening reaction is the reusing and upgrading of plastics.
- Due to continuous use, the condition of the polycondensates decreases resulting in polymers with low quality.
- Solid-state post condensation (SSP) or a rapid chain extension reaction are used to increase the molecular weight and to restore back desirable qualities.
- And the chain extension is done through ring-opening because it is considered less volatile. For example - Polycaprolacton is produced by the ring-opening of caprolactone.
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