SYNTHESIS OF REGULATED STRUCTURE POLYPHENYLETHERSILOXANE BLOCK COPOLYMERS.
Abstract
The substitution of diphenyldianilinosilane for dichlorosilane in the copolymerization with 4,4'dihydroxydiphenylether has resulted in a copolymer with a molecular weight of at least 50,000. The Ullmann condensation is disappointing as a means of preparing dihydroxy derivatives of polyphenylethers. Side reactions reduce the yield. However, intermolecular dehydration of hydroquinone holds promise as a method of preparing 4,4'dihydroxydiphenylether and the dihydroxy derivatives of polyphenylethers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 31, 1963
- Accession Number
- AD0424642
Entities
People
- Eugene S. Yankura
- Robert Macfarlane Jr.