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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Synthesis in pilot plant scale and physical properties of sulfonated polystyrene

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Author(s):
Cristiane R. Martins [1] ; Giacommo Ruggeri [2] ; Marco-A. De Paoli [3]
Total Authors: 3
Affiliation:
[1] Universidade Estadual de Campinas. Instituto de Química - Brasil
[2] Universidade Estadual de Campinas. Instituto de Química - Brasil
[3] Universidade Estadual de Campinas. Instituto de Química - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 14, n. 5, p. 797-802, 2003-10-00.
Abstract

The homogenous sulfonation of polystyrene was developed in a pilot plant scale producing polymers with different sulfonation degrees (18 to 22 mole % of sulfonated styrene units). The reaction yield depends chiefly on the concentration ratio of acetyl sulfate and polystyrene. The morphological and thermal properties of the sulfonated polystyrene obtained by homogeneous sulfonation were studied by means of scanning electron microscopy, differential scanning calorimetry and thermogravimetry. The glass transition temperature of sulfonated polystyrene increases in relation to pure polystyrene and DCp was evaluated in order to confirm the strong interactions among the ~SO3H groups. (AU)