Chemical and Textural Characteristics of Chlorosulfonated Porous Styrene—Divinylbenzene Copolymer Beads

Autor: Abdelmoumen Saggou, Hayat Guettaf, Idir Rabia, Zahir Bencheikh, Farida Iayadene, Jamel E. Zerouk
Rok vydání: 1996
Předmět:
Zdroj: Polymers for Advanced Technologies. 7:543-547
ISSN: 1099-1581
1042-7147
DOI: 10.1002/(sici)1099-1581(199605)7:5/6<543::aid-pat545>3.0.co;2-h
Popis: The influence of chlorosulfonation on textural and chemical characteristics of porous styrene—divinylbenzene copolymer prepared with varying diluent composition (n-heptane and 2-ethyl-1-hexanol mixture) and divinylbenzene content has been investigated in this study. The obtained porous supports are treated with a 40 vol.% chlorosulfonic acid solution in 1,2-dichloroethane. Textural studies of the copolymer show that after chlorosulfonation, the porous volume remains constant at low ethyl hexanol and divinylbenzene content, then varies from 50% ethyl hexanol content in the diluent mixture and 20% DVB content. Comparing before and after chlorosulfonation, the porous volume and apparent density are observed not to vary at low 2-ethyl-1-hexanol and divinylbenzene content but to vary for copolymers with high DVB and prepared with a high ethyl hexanol content in the diluent mixture. Chemical analysis reveals that chlorosulfonation reaction is a two-step reaction leading to the formation of both sulfonyl and chlorosulfonyl derivaties and the optimum total group content is obtained for copolymer prepared with 10% DVB and 80/20 n-heptane/ethyl hexanol mixture as diluent. The content ratio of the chlorosulfonyl and sulfonyl groups also depends on the diluent composition and divinylbenzene content used in the preparation of the beads.
Databáze: OpenAIRE
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