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Patent Number: |
7582722 |
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Case ID: |
0 |
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Patent Title:
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Phenylethynylbenzophenone-endcapped hyperbranched
poly(arylene-ether-ketone-imides)
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Status: |
ACTIVE |
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Status Date: |
2/3/2010 2:14:16 PM |
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Issue Date:
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9/1/2009 |
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Filed Date:
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1/29/2007 |
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Serial #:
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1/700,971 |
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Assignee Name:
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The United States of America as represented by the Secretary of the Air Force
(Washington,
DC)
N/A
(
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Inventor(s):
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Tan, Loon-Seng , Wang, David H. , Arnold, Jr., Fred E. , Storage, Tara M. |
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Lab Name: |
Materials & Manufacturing Directorate |
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Location: |
Building 653, Room 406
Wright-Patterson AFB, OH 45433-7734 |
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Contact: |
Contact Lab About This Patent |
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BACKGROUND OF THE INVENTION
The present invention relates to thermally reactive hyperbranched ether-ketone-imide polymers, particularly to those that are chain-end functionalized with phenylethynyl groups.
Dendritic macromolecules such as dendrimers and hyperbranched polymers are a class of highly branched polymers that have distinctly different properties from their linear analogs. Both dendrimers and hyperbranched polymers have much lower
solution and melt viscosities than their linear analogs of similar molecular weights. They also have a large number of chain-ends whose collective influence dictates their overall physical and/or chemical behaviors. These features are attractive in
terms of processability and offering flexibility in engineering required properties for specific applications. However, there is a practical advantage that hyperbranched polymers have over dendrimers at "raw material" level. Although dendrimers have
precisely controlled structures (de . . . . More |
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Novel ether-ketone-imide hyperbranched polymers with non-reactive
benzophenone or thermally reactive phenylethynyl endgroups were prepared
from the corresponding AB.sub.2 monomer and benzophenone-based endcapping
agent in one-pot fashion. The resulting polymer has repeating units of
the formula: ##STR00001## where the chain-end groups, Ar''s, are
4-benzophenone or 4-benzophenone with ortho, meta- or para-phenylethynyl
substituents in the 4''-position |
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We claim:
1. An ether-ketone-imide hyperbranched polymer having repeating units of the formula: ##STR00006## wherein n=10-20, and Ar is a 4-benzophenone with ortho-, para- or meta-phenylethynyl
substituents in the 4''-position.
2. The polymer of claim 1 where Ar is a thermally non-reactive 4-benzophenone.
3. A method for synthesizing the polymer of claim 1 comprising: a) heating N-[3,5-bis(4-hydroxybenzoyl)benzene]-4-fluorophthalimide in an N-methylpyrrolidinone/toluene mixture in the presence of potassium carbonate to form a hydroxyl-terminated
poly(arylene-ether-ketone-imide); and b) without isolation, directly functionalizing said hydroxyl-terminated poly(arylene-ether-ketone-imide) with 4-fluoro-2''-, 3''- or 4''-(phenylethynyl)benzophenone to produce the corresponding phenylethynyl terminated
hyperbranched polymer.
4. A method for synthesizing the polymer of claim 2 comprising: a) heating N-[3,5-bis(4-hydroxybenzoyl)benzene]-4-fluorophthalim . . . . More |
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