Abstract
Poly (4-chloromethyl styrene-g-4-vinylpyridine)/TiO2 [(PCMSt-g-P4VP)/TiO2] nanocomposite was synthesized by atom transfer radical polymerization (ATRP) technique. The synthesis strategy involved three steps. Firstly, the nano-TiO2 was modified by 3-(trimethoxysilyl) propylmethacrylate (MPS). Secondly, the modified nanoparticles were dispersed in 4-chloromethyl styrene monomers and subsequently polymerized by a free-radical in situ polymerization reaction to yield PCMSt/TiO2 nanocomposite. Finally, poly (4-vinylpyridine) was grafted from PCMSt/TiO2 macroinitiator via ATRP technique with the catalysts of 2,2′-bipyridine (Bpy) and Cu(I)Br in toluene as the solvent. TGA results indicated that no polymers adsorbed noncovalently onto the surface of TiO2 nanoparticles. Also FT-IR spectra and TEM images investigation provided direct and clear evidence for the presence of PCMSt and (PCMSt-g-P4VP) shell on nano-TiO2 core particles. Ultraviolet–visible spectroscopy (UV-Vis) investigated that these nanocomposites have improved optical properties potentially acting as visually transparent UV filters.
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Abbreviations
- CRP:
-
Controlled/living radical polymerization
- ATRP:
-
Atom transfer radical polymerization
- PCMSt:
-
Poly (4-chloromethyl styrene)
- P4VP:
-
Poly (4-vinylpyridine)
- AIBN:
-
2,2′-Azobis (isobutyronitrile)
- Bpy:
-
2,2′-Bipyridine
- TEM:
-
Transmission electron microscopy
- Tg :
-
Glass transition temperature
- DSC:
-
Differential scanning calorimetry
- TGA:
-
Thermogravimetric analysis
- BET:
-
Specific surface area
- MPS:
-
3-(Trimethoxysilyl) propylmethacrylate
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I express my gratitude to the Bonyade Melli Nokhbeghan Institute and Payame Noor University for supporting this project.
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Jaymand, M. Synthesis and characterization of well-defined poly (4-chloromethyl styrene-g-4-vinylpyridine)/TiO2 nanocomposite via ATRP technique. J Polym Res 18, 1617–1624 (2011). https://doi.org/10.1007/s10965-011-9566-x
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DOI: https://doi.org/10.1007/s10965-011-9566-x