Polyarylate

Polyarylate is a class of high-performance thermoplastic polyesters derived from aromatic dicarboxylic acids and bisphenols. These polymers are known for their exceptional thermal stability, mechanical strength, and chemical resistance. The rigid aromatic structure within the polymer backbone contributes significantly to these properties, allowing polyarylates to maintain their structural integrity at elevated temperatures.

The synthesis of polyarylate typically involves the polycondensation reaction between aromatic dicarboxylic acid chlorides, such as terephthaloyl chloride or isophthaloyl chloride, and bisphenols, like bisphenol A or bisphenol C. This process can be carried out through various methods, including interfacial polymerization or high-temperature solution polymerization. The specific choice of monomers allows for tailoring of the final polymer properties.

Polyarylates find applications in demanding environments where resistance to heat, chemicals, and mechanical stress is crucial. Common uses include electrical connectors, automotive components, aerospace parts, and protective coatings. Their inherent flame retardancy and good electrical insulating properties also make them suitable for electronic and electrical applications. While offering excellent performance, polyarylates can be more costly to produce compared to commodity plastics, which influences their market penetration. Their processing typically requires higher temperatures due to their high glass transition temperatures.