Used as a key monomer in step-growth polymerization to produce acetylene-based polyarylates. These polymers exhibit high thermal stability and mechanical strength, making them suitable for advanced composite materials in aerospace and electronics. The terminal alkyne groups enable post-polymerization modifications via click chemistry, allowing functionalization for specialized coatings, adhesives, and optoelectronic materials. Also explored in crosslinkable resin systems for 3D printing and photolithography due to its reactivity under UV curing conditions.