Phase Transfer Catalytic Nucleophilic Addition Reactions: Synthesis of Polymers and Acetylenic Terminated Resins
Final technical rept. Jun 1991-15 Aug 1992,
DEXTER-HYSOL AEROSPACE INC PITTSBURG CA
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Solid-liquid phase transfer catalysis SLPTC was studied to facilitate the preparation of acetylene-terminated AT resins. 3-Ethylphenol, as a model system, was found to react with p,p-difluorobenzophenone and p,p- difluorodiphenylsulfone in refluxing pyridine using SLPTC to give high yields of the corresponding disubstitution products. However, the p,p-dichloro derivatives afforded a mixture consisting predominantly of monosubstituted product. 3-Ethynylphenol was reacted under similar conditions to afford AT resins which were compared with AT resins made by conventional synthesis methods. High molecular weight, soluble polyetherether ketones and polysulfones were made by reacting bisphenols and appropriate difluoroaromatic compounds in refluxing pyridine using SLPTC.
- Organic Chemistry
- Physical Chemistry
- Polymer Chemistry