Accession Number:

AD0466517

Title:

CONJUGATED POLYMER SYSTEMS

Descriptive Note:

Technical Report,01 Nov 1959,31 Jan 1960

Corporate Author:

PENNSYLVANIA UNIV PHILADELPHIA PHILADELPHIA United States

Personal Author(s):

Report Date:

1960-01-31

Pagination or Media Count:

33.0

Abstract:

Studies by Gerald Staffin of the polymerization of 4-bromo-2,6-dimethyl-phenol to poly-2,6-dimethyl-p-phenylene oxide have been extended to dialkyl o- and p- bromophenols in which the two alkyl groups were various combinations of methyl, allyl, propyl and phenyl indicated that all of these compounds were readily polymerizable. In general, the o-bromophenols gave lower yields and lower molecular weights. The allyl phenol polymers became insoluble and infusible after exposure to the atmosphere for a few days, evidently due to crosslinking through the allyl double bonds. Polymer made by oxidative polymerization of 2,6-dimethylphenol had infrared and ultraviolet spectra essentially identical to the poly2,6-dimethyl-p-phenylene oxide prepared from the 4-bromo monomer. This indicates that the majority of the units in the oxidative polymer are indeed p-linked. The oxidative polymerization gave polymer of considerably lower molecular weight from 2,6-diallylphenol and failed entirely for 2,6-dibromophenol, indicating more critical structural requirements for satisfactory polymerization by this procedure, as compared to the bromine displacement procedure.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE