Site-Selective Trimodular Polymerization to Amino Acid-Based Poly(ether amide)s with Divergent Properties

Area of Science:

• Polymer Chemistry
• Organic Synthesis
• Materials Science

Background:

• Amido groups are crucial in polymers, but traditional polyamide synthesis requires harsh conditions or reactive monomers.
• Developing milder, more efficient methods for creating backbone-amido polymers is essential for broader applications.

Purpose of the Study:

• To report a novel, mild, and atom-economic pathway for synthesizing poly(ether amide)s (PEAs).
• To demonstrate the versatility of PEAs through structural diversification and property refinement.

Main Methods:

• Linear step polymerization of diepoxides and amide-bearing primary diols (formed in situ from amino alcohols and γ-butyrolactone).
• Utilized a chemoselective Lewis pair (organo)catalyst for preferential activation of primary hydroxyl groups.
• Employed a trimodular synthesis approach with abundant starting materials.

Main Results:

• Successfully synthesized PEAs via a mild and atom-economic route.
• Achieved high interfacial performance in two distinct areas: broad-spectrum protein resistance (hydrophilic PEAs) and robust adhesion (hydrophobic PEAs).
• Demonstrated adhesion durability at liquid nitrogen temperatures and after 10 reuse cycles.

Conclusions:

• The reported method offers a versatile and sustainable approach to PEA synthesis.
• The ability to tune PEA properties through structural diversification opens avenues for advanced material applications.
• This work provides a valuable alternative to conventional polyamide synthesis, enabling tailored functionalities.