Magnetic Polystyrene Nanocomposites Reinforced with Magnetite Nanoparticles. Issue 4 (3rd September 2013)

• Record Type: Journal Article
• Authors: Yan, Xingru; He, Qingliang; Zhang, Xi; Gu, Hongbo; Chen, Haoran; Wang, Qiang; Sun, Luyi; Wei, Suying; Guo, Zhanhu
• Is Part Of: Macromolecular materials and engineering. Volume 299:Issue 4(2014:Apr.)
• Page Start: 485
• Page End: 494
• Publication Date: 2013-09-03
• Subjects: Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1002/mame.201300208
• Languages: English
• ISSNs: 1438-7492

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <sec id="mame201300208-sec-0001" sec-type="section"> <p>Polystyrene (PS)/magnetite (Fe<sub>3</sub>O<sub>4</sub>) polymer nanocomposites (PNCs) are successfully synthesized by a solvent extraction method. Scanning electron microscopy reveals that the nanoparticles are well distributed in the PS matrix with 5, 10, and 20 wt% without obvious agglomeration. Fourier transform infrared spectroscopy analysis indicated that the PS/Fe<sub>3</sub>O<sub>4</sub> PNCs are synthesized with strong interaction between PS and nanoparticles. The thermogravimetic analyzer and microscale combustion calorimetry reveal an enhanced thermal stability and reduced flammability. The differential scanning calorimetry demonstrates both glass transition temperature (<italic>T</italic><sub>g</sub>) and melting temperature (<italic>T</italic><sub>m</sub>) increased with increasing the Fe<sub>3</sub>O<sub>4</sub> nanoparticle loading. The observed monotonically decreased complex viscosity indicates a strong shear thinning behavior in the PNCs; meanwhile, the percolation takes place in the low frequency range (0.1–1 Hz) when the nanoparticles are introduced in the matrix. The <italic>T</italic><sub>g</sub> of the PS/Fe<sub>3</sub>O<sub>4</sub> nanocomposites determined from the dynamic mechanical analysis shifts to a higher temperature compared with that of pure PS. Enhanced dielectric properties relate to the Fe<sub>3</sub>O<sub>4</sub> NP loadings. In addition, the PS/Fe<sub>3</sub>O<sub>4</sub> PNCs exhibit superparamagnetic behavior at room temperature.<inline-graphic xlink:href="ark:/27927/pgg55mvwm1p" content-type="mame201300208-gra-0001" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> </sec> </abstract>