Add time:09/09/2019         Source:sciencedirect.com

Publisher SummaryPoly (arylene ether sulfone)s, (PAES)s, have been known since 1970's. They are tough linear polymers and possess a number of attractive features, such as excellent high-temperature resistance, good electrical properties, and good hydrolytic stability. PAESs are also known as poly (sulfone) resins. In ordinary organic chemistry, thioether is a synonym for sulfide. PAESs are mainly used for adhesives, coatings, and sealants because they are easily cross-linkable at room temperature. The most common monomer is 4, 4-dichlorodiphenyl sulfone as sulfone combined with 4, 4-biphenol (BP) or bisphenol A as hydroxy component. In a diluted solution of dimethylacetamide, the ether linkages of poly(ether sulfone) (PES) are opened and macrocyles are formed. The reaction products show a linear oligomer content of less than 4%. The macrocyclic oligomers can undergo ring-opening polymerization in the presence of phenoxide and, especially thiophenoxide initiators to regenerate a high-molecular-weight polymer. Therefore, it is believed that the recovery and recycling of PES is feasible.

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