Phenylethynyl-terminated poly(arylene ethers)
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsBrian J. Jensen, Robert G. Bryant, Paul M. Hergenrother
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Abstract
Phenylethynyl-terminated poly(arylene ethers) are prepared in a wide range of molecular weights by adjusting monomer ratio and adding an appropriate amount of 4-fluoro-4'-phenylethynylbenzophenone during polymer synthesis. The resulting phenylethynyl-terminated poly(arylene ethers) react and crosslink upon curing for one hour at 350.degree. C. to provide materials with improved solvent resistance, higher modulus and better high temperature properties than the linear, uncrosslinked polymers.
Claims15
A phenylethynyl-terminated poly(arylene ether) having the general structure ##STR32## wherein Ar is any dihydroxy moiety capable of undergoing aromatic nucleophilic substitution, X is any difunctional moiety capable of undergoing aromatic nucleophilic substitution, and the number average molecular weight of the phenylethynyl-terminated poly(arylene ether) is between about 1,000 and 100,000.
Dependencies are inferred from the claim text.