Synthesis of well-defined poly(n-vinylpyrrolidone)/n-TiO2 nanocomposites by xanthate-mediated radical polymerization

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Rafiei Hamid; ABBASIAN MOJTABA; YEGANI REZA

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Journal Paper

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Journal: Iranian Polymer Journal Year:2020 | Volume:29 | Issue:5 Page(s): 371-381

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Title

Synthesis of well-defined poly(n-vinylpyrrolidone)/n-TiO2 nanocomposites by xanthate-mediated radical polymerization

Author(s)

Rafiei Hamid | ABBASIAN MOJTABA | YEGANI REZA

Keywords

RAFT polymerization

PNVP

n-TiO2 nanoparticles

Metalation

Surface polymerization

Abstract

For the first time formation of well-defined poly n-vinylpyrrolidone/n-TiO2 nanocomposite by xanthate-mediated radical polymerization was accomplished. The synthesis of polymer nanocomposite materials has been intensively studied due to their extraordinary properties and wide-spread potential applications. For this purpose, first 2‐, propionic acid-O-ethyl xanthate, as a RAFT agent, was synthesized by the reaction of 2-bromopropionic acid with potassium O-ethyl xanthate with acetone as the solvent. A carboxylic group in the RAFT agent was attached to the n-TiO2 surface by Metalation reaction. Then, RAFT polymerization of n-vinylpyrrolidone (NVP) was subsequently conducted to graft poly(n-vinylpyrrolidone) (PNVP) onto the exterior surface of n-TiO2 nanoparticles, forming a novel core–, shell nanostructure with a mesoporous core and a polymeric nanoshell. The viscosimetry data and 1H NMR spectra were used to calculate the molecular weight of the polymer. The obtained results showed a good agreement withthe methods used. A significant enhancement in the stability of the composites was obtained as demonstrated by the TGA results. The SEM and TEM results showed that the polymer was formed on the surface of the particles. The XRD pattern of the nanoparticles of n-TiO2 presented the amorphous structure of the crystal morphology of the composites. The FTIR and UV–, visible spectroscopy results proved that the PNVP chains were grafted onto the n-TiO2 nanoparticles by surface RAFT polymerization.

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APA: Copy

Rafiei, Hamid, ABBASIAN, MOJTABA, & YEGANI, REZA. (2020). Synthesis of well-defined poly(n-vinylpyrrolidone)/n-TiO2 nanocomposites by xanthate-mediated radical polymerization. IRANIAN POLYMER JOURNAL (ENGLISH), 29(5), 371-381. SID. https://sid.ir/paper/1043061/en

Vancouver: Copy

Rafiei Hamid, ABBASIAN MOJTABA, YEGANI REZA. Synthesis of well-defined poly(n-vinylpyrrolidone)/n-TiO2 nanocomposites by xanthate-mediated radical polymerization. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2020;29(5):371-381. Available from: https://sid.ir/paper/1043061/en

IEEE: Copy

Hamid Rafiei, MOJTABA ABBASIAN, and REZA YEGANI, “Synthesis of well-defined poly(n-vinylpyrrolidone)/n-TiO2 nanocomposites by xanthate-mediated radical polymerization,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 29, no. 5, pp. 371–381, 2020, [Online]. Available: https://sid.ir/paper/1043061/en

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