Acetylene-terminated hyperbranched poly(arylene-ether-ketone-imides)
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsLoon-Seng Tan, David H. Wang
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Abstract
Novel ether-ketone-imide hyperbranched polymers with thermally reactive ethynyl endgroups were prepared from the corresponding AB2 monomer and the respective benzophenone-based endcapping agents in one-pot fashion. The resulting polymer has repeating units of the formula: where the chain-end groups, Ar is a benzophenone with an ortho, a meta- or a para-ethynyl substituent.
Claims4
A method for the preparation of the compound having the formula:
- comprising the steps of:
- a) heating a mixture of 4-bromobenzoyl chloride, fluorobenzene and anhydrous aluminum chloride and isolating 4-fluoro-2′-trimethylsilylethynylbenzophenone as the intermediate at the end of the reaction;
- and
- b) stirring 4-fluoro-2′-trimethylsilylethynylbenzophenone, and cesium fluoride in methanol at room temperature to produce the compound.
A method for the preparation of the compound having the formula:
- comprising the steps of:
- a) heating a mixture of 4-bromobenzoyl chloride, fluorobenzene and anhydrous aluminum chloride and isolating 4-fluoro-3′-trimethylsilylethynylbenzophenone as the intermediate at the end of the reaction;
- and
- b) stirring 4-fluoro-3′-trimethylsilylethynylbenzophenone and cesium fluoride in methanol at room temperature to produce the compound.
An ether-ketone-imide hyperbranched polymer having repeating units of the formula:
- wherein n=10-20, and Ar is a 4-benzophenone with ortho-, para- or meta-ethynyl substituents in the 4′-position.
Dependencies are inferred from the claim text.