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Synthesis and characterization of novel pyrimidine-containing poly(arylene ether)s

Two novel thermally stable high-performance polymers, poly(arylene ether pyrimidine)s have been prepared with 2,4-dichloropyrimidine and 4,4′-(hexafluoroisopropylidene)diphenol and bisphenol A by nucleophilic displacement reaction, respectively. Gel permeation chromatography results show that the obtained polymers exhibited 20,000 g mol−1 weight-average molecular weight. Thermal analysis studies indicate glass transition temperature values up to 156°C in differential scanning calorimetry and thermogravimetric analysis results revealed outstanding thermal stability up to 430 and 427°C for 5% weight loss under nitrogen and in air atmospheres, respectively. The polymers are soluble in a wide range of organic solvents, such as tetrahydrofuran, chloroform, N-methyl-2-pyrrolidone, N,N-dimethylacetamide, N,N-dimethylformamide, dimethyl sulfoxide, and toluene at room temperature. The cutoff wavelengths of the resulting polymers were in the range of 278–283 nm.