A General Strategy To Access Alternating Styrene/Substituted Styrene Copolymers by Using a Traceless Controlling...

Area of Science:

• Polymer Chemistry
• Organic Synthesis

Background:

• Conventional methods struggle to synthesize alternating copolymers of similar styrene-type monomers.
• Controlling copolymer composition and sequence is crucial for advanced material properties.

Purpose of the Study:

• To develop a novel synthetic strategy for creating alternating copolymers of styrene and substituted styrenes.
• To utilize α-styryl boronate pinacol ester (StBpin) as a versatile co-monomer in radical polymerization.

Main Methods:

• Radical alternating copolymerization of StBpin with various substituted styrenes.
• Protodeboronation of the resulting StBpin-containing polymers to yield the final alternating copolymers.
• Investigation of the role of the Bpin group in promoting alternating polymerization behavior.
• Compatibility assessment with Reversible Addition-Fragmentation chain Transfer (RAFT) living polymerization.

Main Results:

• Demonstrated a successful synthetic strategy for alternating copolymers using StBpin.
• Showcased the effectiveness of StBpin with a broad range of substituted styrenes, irrespective of electronic effects.
• Achieved highly efficient protodeboronation without compromising polymer backbone integrity.
• Confirmed compatibility with RAFT living polymerization, expanding synthetic utility.

Conclusions:

• The StBpin-based strategy provides a robust method for synthesizing alternating copolymers of similar styrene-type monomers.
• The steric and stabilizing effects of the Bpin group are key to the observed alternating polymerization behavior.
• This approach overcomes previous synthetic limitations, enabling access to previously inaccessible copolymer structures.