Modification of industrial divinyl rubber by oxidative chlorophosphorylation and assess-ment of metal ion removal efficiency of obtained polymer sorbent

Abstract

The main goal of this study was the preparation of materials containing phosphoric func-tionalities on the base of industrial polymer -divinyl rubber and the assessment of their removal effi ciency of heavy metals from aqueous solutions. The new method concerns the oxidative chlo-rophosphorylation of divinyl rubber by PCl 3 with the following modifi cation of obtained inter-mediates to create -PO(OH) 2 , -OPO(OH) 2 groups in the polymer chain. The obtained modifi ed polymers get some new properties such as complex formation and capability for ion exchange. The nature and distribution of phosphoric functionalities in the polymer were studied by the methods of NMRand FTIR-spectroscopy, thermal analysis and scanning electron microscopy. The sorption properties of synthesized polymers towards some cations (Cu +2 , Ni +2 , Co +2 and Zn +2) from water solutions have been tested. It has been shown that the metal removal effi ciency of prepared material depends on pH of medium, initial concentration and type of metal ions.Keywords: Divinyl rubber, modifi cation by chlorophosphorylation, nature and distribution of phosphoric functionalities in the polymer matrix, heavy metal ions, sorption.

Fabrication of Functional Carbon/Magnetic Nanocomposites as A Promising Model of Utilization of Used Crosslinked Polymers

“…The metal derivatives of butadiene rubber-based PhCP were chosen as the model systems of used CFP. PhCP material presented in this paper was characterized before in our previous works [33,34,35] using solid state NMR, FTIR spectroscopy, elemental analysis, cation-exchange capacity measurement, potentiometric titration, and SEM analysis. The general characteristics of PhCP is presented in Table 1.…”

“…The band at about 3394 cm −1 is attributed to OH vibration in –PO(OH) 2 groups. IR band at 986 cm −1 , corresponds to C–O–P bond and indicates attachment of –PO(OH) 2 groups to the polymer chains [20,33]. Mutual comparison of the bare PhCP and its metal forms (see Figure 1B–D) revealed some differences in the region between 800–1200 cm −1 .…”

“…Phosphorus-containing polymer (PhCP) in the hydrogen form as a starting material was synthesized via oxidative chlorophosphorylation reaction of butadiene rubber using the method described before [33]. The corresponding metals salts (Co(NO 3 ) 2 ⋅6H 2 O; Ni(NO 3 ) 2 ⋅6H 2 O; and FeCl 3 ⋅6H 2 O) were used for preparing metal forms of PhCP.…”