Chapter 15. Polymers Chemistry Class 12 Chapter 15 Polymer Class 12 Chemistry | Page 14

Resins
1 . Phenol-Formaldehyde Polymer ( Bakelite and Related Polymers )
These polymers are obtained by the condensation reaction of phenol with formaldehyde in the presence of either acid or a base catalyst . The reaction involves the formation of methylene bridge at ortho , para or both ortho and para positions . A linear or cross linked material is obtained depending upon the condition of reaction .