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Chemical modification of poly(2,6-dimethyl-1,4-phenylene oxide) by friedel–crafts reactions

✍ Scribed by Simona Percec

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
544 KB
Volume
33
Category
Article
ISSN
0021-8995

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✦ Synopsis

The chemical modification of poly(2,6-dimethyl-l,4-phenylene oxide) (PPO) by electrophilic sulfonylation and acylation of the aromatic structural units has been investigated. A maximum monosubstitution degree of 79.4 has been reached. Higher substitution levels were difficult to achieve because of both a decrease in the remaining position nuclmphilicity and steric hindrances. Minor changes in thermal stability and a broadening of the solubility range of substituted PPO compared with the parent PPO have been recorded. Very good permeation properties to gases, better than for PPO, have been detected for the modified structures.

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