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Chemical modification of polystyrene—IV. Electrophilic substitution of polystyrene with cis-1,2,3,6 tetrahydrophthalic anhydride

✍ Scribed by M. Biswas; S. Chatterjee

Book ID: 103076703
Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 276 KB
Volume: 19
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(83)90166-0

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✦ Synopsis

Polystyrene has been chemically modified by Friedel-Crafts acylation with cis-1,2,3,6 tetrahydrophthalic anhydride in the presence of anhydrous aluminium chloride. The product, polyl-4-vinylphenyl-2'carboxy-4' ene-cyclohexyl ketone], has been characterized by solubility studies, chemical analysis, i.r., ion-exchange capacity measurements and pH-titration behaviour. Thermal stability measurements indicate improved properties relative to the parent polymer. In the presence of concentrated sulphuric acid, the keto-acid is cyclized to a polymer of further improved thermal stability.

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