Influence of reaction time and carbon disulfide amount on sulfophosphorylation reaction of phosphorylated resins

Fabio Merçon,Luiz Claudio Santa Maria,Marcelo Augusto Vieira Souza,Luciana da Cunha Costa,Marcos Antonio da Silva Costa

doi:10.17648/uezo-ast-v6i1.163

Fabio Merçon, Luiz Claudio Santa Maria

Open Access

https://doi.org/10.17648/uezo-ast-v6i1.163

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Abstract

In this work, we studied the sulfophosphorylation reaction of phosphorylated resins by varying the reaction time and CS2 amount and characterized these materials thoroughly by thermogravimetry (TG) and infrared spectroscopy (FTIR). The thermal stability and the FTIR spectra of the Sty-DVB copolymers were significantly changed after the phosphorylation and sulfophosphorylation reactions. The unmodified copolymers presented one degradation stage while the sulfophosphorylated copolymers showed two degradation stages, due to the presence of phosphorous and sulfur in the polymeric matrix. There was a tendency for increasing content of sulfophosphoryl groups incorporated into the Sty-DVB copolymers with increasing CS2 amount and reaction time. However, for high CS2 amounts, a long reaction time was not necessary to transform the phosphoryl groups into sulfophosphoryl groups. The best conversion degree of phosphoryl into sulfophosphoryl groups was obtained by using reaction time of 144 h and 0.25 mol of CS2.

Highlights

Organophosphorus and complex sulfur compounds have been reported to possess biocidal action [1,2]
The phosphorylation reaction of styrene-divinylbenzene (Sty-DVB) copolymers has been studied in our previous work and the synthesized materials have been characterized 5
Sty-DVB copolymer with a macroporous structure was submitted to phosphorylation reaction by using PCl3/ AlCl3 according to the method previously published 5

Summary

Introduction

Organophosphorus and complex sulfur compounds have been reported to possess biocidal action [1,2]. Reaction of phosphoryl groups with CS2 in order to introduce sulfophosphoryl groups into Sty-DVB copolymers was difficult to achieve, with low conversion degree 3. Sty-DVB copolymer with a macroporous structure was submitted to phosphorylation reaction by using PCl3/ AlCl3 according to the method previously published 5.

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