| 摘要 |
High heat polyethersulfone compositions are provided which possess unexpectedly high glass transition temperatures. The polyethersulfone compositions comprise structural units derived from fluorenone bisphenols such as 9,9-bis(4-hydroxyphenyl)fluorene, and structural units derived from at least one biphenyl-bissulfone such as 4,4'-bis((4-chlorophenyl)sulfonyl)-1,1'-biphenyl. The novel polyethersulfone compositions may further comprise structural units derived from one or more biphenols such as 4,4'-biphenol, bisphenols such as BPA, or other electrophilic sulfone monomers, such as bis(4-chlorophenyl)sulfone. In one embodiment, the polyethersulfone composition of the present invention comprises structural groups derived exclusively from 9,9-bis(4-hydroxyphenyl)fluorene and 4,4'-bis((4-chlorophenyl)sulfonyl)-1,1'-biphenyl and exhibits a single glass transition of greater than 300° C.
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