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Chemistry and adhesive properties of poly(arylene ether)s containing heterocyclic unitsNovel poly(arylene ether)s containing heterocyclic units were prepared, characterized, and evaluated as adhesives and composite matrices. The polymers were prepared by reacting a heterocyclic bisphenol with an activated aromatic dihalide in a polar aprotic solvent, using potassium carbonate. The polymerizations were generally carried out in N,N-dimethylacetamide at 155 C. In some cases, where the polymers were semicrystalline, higher temperatures and thus higher boiling solvents were necessary to keep the polymers in solution. Heterocyclic rings incorporated into the poly(arylene ether) backbone include phenylquinoxaline, phenylimidazole, benzimidazole, benzoxazole, 1,3,4-oxadiazole, and 1,2,4-triazole. The polymers were characterized by differential scanning calorimetry, solution viscosity, X-ray diffraction, thin film, and adhesive and (in some cases) composite properties. The glass transition temperatures, crystalline melt temperature, solubility, and mechanical properties varied depending upon the heterocyclic ring. The chemistry and properties of these materials are discussed.
Document ID
19930070891
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Connell, John W.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1991
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: Adhesion Society, Annual Meeting
Location: Clearwater, FL
Country: United States
Start Date: February 17, 1991
End Date: February 20, 1991
Sponsors: Adhesion Society
Accession Number
93A54888
Distribution Limits
Public
Copyright
Other

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