The functionalized polymers based on anionic polymerization usually have strict requirements for functionalized reagents. We report a general functionalization method to make amide end-functionalized polymers. The polymer was synthesized by an anionic polymerization using n-butyl lithium as initiator, then was terminated by high purity carbon dioxide. After that, three different reagents, sulfoxide chloride, dicyclohexylcarbodiimide (DCC), propylphosphonic anhydride (T3P) are used to activate the carbonyl group at the end of the polymer chain so that it can react with amines. It is generally considered that the electron-rich functional groups, such as amides, have strong interactions with the surface of carbon black through hydrogen bonding, van der Waals forces, etc. Here, we report a synthesis of an acylhydrazide end-functionalized polymer by using phenylhydrazine as an amine reagent, and the rheological properties of the polymer filled carbon black. The rheological results show that these functionalized polymers may be used to provide superior properties of tread rubber materials.

Synthesis and rheological properties of amide end-functionalized polymers

ACS Spring 2022

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