Sequential Post-Polymerization Modification of Aldehyde Polymers to Ketone and Oxime Polymers

Area of Science:

• Polymer Chemistry
• Organic Synthesis
• Materials Science

Background:

• Multifunctional polymers are crucial for advanced applications.
• Existing synthesis routes can be complex or inefficient.
• Post-polymerization modification offers a versatile strategy for polymer functionalization.

Purpose of the Study:

• To develop a new sequential post-polymerization modification route.
• To synthesize polymers with dual functionalities (ketone and oxime).
• To achieve efficient and site-specific functionalization.

Main Methods:

• Radical polymerization of 4-vinyl benzaldehyde to create a template aldehyde polymer.
• Rhodium-catalyzed hydroacylation of the aldehyde polymer with alkenes to introduce ketone groups.
• Schiff base formation using alkoxy ammonium salts to introduce oxime functionalities.

Main Results:

• Successfully synthesized multifunctional polymers with both ketone and oxime groups.
• Demonstrated high efficiency in both modification steps.
• Achieved evenly distributed dual functionalities at the same position on the polymer chain.

Conclusions:

• The developed sequential modification route is highly efficient for creating dual-functional polymers.
• This method provides precise control over polymer functionality.
• The synthesized polymers hold potential for various advanced material applications.