SPECIFIC HEAT CAPACITY OF FLOWERLIKE ZnO-PMMA COMPOSITES INVESTIGATED BY DSC.

Date

2017-04-01

Author

Sezer, Selda

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

93
views

0
downloads

A series flowerlike ZnO-PMMA (FL-ZnO-PMMA) composites were synthesized from PMMA and different amount of flowerlike ZnO (FL- ZnO) particles via the solution direct-dispersing and in-situ polymerization method. FL-ZnO particles have been synthesized using the hydrothermally technique. Effects of synthesis conditions on the crystal structure, crystallite size, microstructure and morphological properties of the produced FL-ZnO particles were investigated by FTIR, X-ray and SEM. The prepared ZnO nanostructures with flowerlike morphology have been blended with methyl methacrylate and this solution was polymerized by in-situ radical polymerization technique to prepare FL-ZnO-PMMA composite films. The obtained nanocomposite films are highly transparent, flexible and chemically stable. Investigation of specific heat capacity of composites is achieved by using differential scanning calorimeter. This study is unique about exploration of effect of FL-ZnO amount on specific heat capacity of polymeric composites.

URI

http://www.journalijar.com/uploads/88_IJAR-16449.pdf
https://hdl.handle.net/11511/97219

Journal

Int. J. Adv. Res.

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Chemical synthesis of pure and Gd-doped CaZrO3 powders Gonenli, IE; Tas, AC (1999-01-01) Aqueous solutions of calcium chloride (CaCl2.2H(2)O) and zirconium oxychloride (ZrOCl2.8H(2)O), in appropriate volumetric amounts, were used as the starting chemicals in the synthesis of phase-pure CaZrO3 powders. Rare earth element dopings (up to 25 at%) were performed by using the aqueous chloride solutions of gadolinium (Gd). Formation of CaZrO3 powders were achieved by two different chemical synthesis techniques: (i) self-propagating combustion synthesis, and (ii) precipitation in the presence of EDTA b...
Ionic conductivity of microporous titanosilicate ETS-10 and ion-exchanged Mn+-ETS-10 (where, Mn+ = Li+, Na+, Mg2+, Zn2+, Ca2+) thin films prepared by secondary growth method Galioglu, Sezin; Çam, İbrahim; Akata Kurç, Burcu (2017-09-15) Impedance spectroscopy was used to investigate the long-range ionic conductivity of the microporous, titanosilicate (Na,K)-ETS-10 and ion-exchanged Mn+-ETS-10 (where, Mn+ = Li+, Na+, Mg2+, Zn2+, Ca2+) thin films prepared by secondary growth method. To figure out the effect of grain boundary on ionic conduction, as-synthesized (Na,K)-ETS-10 films possessing different thicknesses of columnar grain structure (i.e., films prepared via 4h-, 6h-, 8h-, and 10h-growth) were tested. The conductivities of the films w...
Specific heat of NH4Br and NH4BrxCl1-x crystals close to the antiferroelectric transition Yurtseven, Hasan Hamit (AIP Publishing, 2005-11-01) We calculate the specific heat C-VI of NH4Br and mixed crystals of NH4BrxCl1-x using the Ising model for the transition between the disordered (D) and antiferro- (AF) electric phases in these crystalline systems. Our C-VI values, which we calculated for x(Br)=1, 0.26, and 0.51 are in good agreement, both below and above T-C, with the observed C-P data from the literature. Our value of congruent to 0.1 (T < T-C and T>T-C) for the critical exponent of the specific heat agrees with the value of 0.125 predicted...
Nano-organic carbon and soot particle measurements in a laminar ethylene diffusion flame D'Anna, A; Rolando, A; Allouis, Christophe Gerard; Minutolo, P; D'Alessio, A (2005-01-01) The formation of carbonaccous particulates in a co-flow laminar diffusion flame has been studied using UV-visible spectroscopy and laser scattering/extinction techniques for measurements of volume fractions and particle sizes. Measurements were performed in a non-smoking ethylene-air flame at atmospheric pressure. UV-visible spectroscopy allowed the identification of two classes of particles: soot particles, which absorb light in the whole spectral range and nano-organic carbon particles (NOC) which are tra...
Sorption Efficiency of Chitosan Nanofibers toward Metal Ions at Low Concentrations Horzum, Nesrin; Boyacı, Ezel; Eroglu, Ahmet E.; Shahwan, Talal; Demir, Mustafa M. (2010-12-01) Chitosan fibers showing narrow diameter distribution with a mean of 42 nm were produced by electrospinning and utilized for the sorption of Fe(III), Cu(II), Ag(I), and Cd(II) ions from aqueous solutions. The ion concentrations in the supernatant solutions were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The filtration efficiency of the fibers toward these ions was studied by both batch and microcolumn methods. High efficiency in sorption of the metal ions was obtained in the both...

Citation Formats

S. Sezer, “SPECIFIC HEAT CAPACITY OF FLOWERLIKE ZnO-PMMA COMPOSITES INVESTIGATED BY DSC.,” Int. J. Adv. Res., vol. 5, no. 4, pp. 97–111, 2017, Accessed: 00, 2022. [Online]. Available: http://www.journalijar.com/uploads/88_IJAR-16449.pdf.