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Characterization of silver/polystyrene nanocomposites prepared by in situ bulk radical polymerization

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2014
Authors
Vukoje, Ivana D.
Vodnik, Vesna
Džunuzović, Jasna
Džunuzović, Enis S.
Marinović-Cincović, Milena
Jeremić, Katarina B.
Nedeljković, Jovan M.
Article (Published version)
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Abstract
Nanocomposites (NCs) with different content of silver nanoparticles (Ag NPs) embeded in polystyrene (PS) matrix were prepared by in situ bulk radical polymerization. The nearly monodisperse Ag NPs protected with oleylamine were synthesized via organic solvo-thermal method and further used as a filler. The as-prepared spherical Ag NPs with diameter of 7.0 +/- 1.5 nm were well dispersed in the PS matrix. The structural properties of the resulting Ag/PS NCs were characterized by transmission electron microscope (TEM) and Fourier transform infrared (FTIR) spectroscopy, while optical properties were characterized using optical absorption measurements. The gel permeation chromatography (GPC) measurements showed that the presence of Ag NPs stabilized with oleylamine has no influence on the molecular weight and polydispersity of the PS matrix. The influence of silver content on the thermal properties of Ag/PS NCs was investigated by thermogravimetric analysis (TGA) and differential scanning ca...lorimetry (DSC). The results indicated that resistance of PS to thermal degradation was improved upon incorporation of Ag NPs. The Ag/PS NCs have lower glass transition temperatures than net PS because loosely packed oleylamine molecules at the interface caused the increase of free volume and chain segments mobility near the surface of Ag NPs.

Keywords:
Metal / Composites / Differential scanning calorimetry (DSC) / Thermogravimetric analysis (TGA) / Optical properties
Source:
Materials Research Bulletin, 2014, 49, 434-439
Publisher:
  • Pergamon-Elsevier Science Ltd, Oxford
Projects:
  • Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-45020)
  • Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-172056)
  • Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-172062)

DOI: 10.1016/j.materresbull.2013.09.029

ISSN: 0025-5408

WoS: 000330081400067

Scopus: 2-s2.0-84886430243
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1531
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