SYNTHESIS OF RED STRUCTURE POLYPHENYLETHER SILOXANE BLOCK COPOLYMERS.
Abstract
Copolymers of 4, 4'-dihydroxydiphenylether with diphenyldichlorosilane of comparatively high molecular weight were prepared. Some, which were previously reported to be prematurely cross linked were found to be soluble in dimethylform amide, and polymerization in this solvent has resulted in completely soluble polymer. This result, with analytical measurements, indicates adequate monomer purity. The preparation of dihydroxypolyphenylethers was attempted by means of the Ullmann condensation reaction between dibromo- and dihydroxyaromatic compounds. Pre liminary results indicate that the desired mono mers were formed. A condensation by dehydration of hydroquinone resulted in the formation of 4,4'-dihydroxydiphenylether, but no polyphenyl ether derivatives were detected in the products of this reaction. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1963
- Accession Number
- AD0418105
Entities
People
- Eugene S. Yankura
- Robert J Macfarlane