Synthesis and mechanical properties of unsaturated polyester based nanocomposites

Inceoglu, AB
Yılmazer, Ülkü
Two classes of nanocomposites were synthesized using an unsaturated polyester resin as the matrix and sodium montmorillonite as well as an organically modified montmorillonite as the reinforcing agents. X-ray diffraction pattern of the composites showed that the interlayer spacing of the modified montmorillonite expanded from 1.25 nm. to 4.5 nm, indicating intercalation. Glass transition values of these composites increased from 72degreesC, in the unfilled unsaturated polyester, to 86degreesC in the composite with 10% organically modified montmorillonite. From Scanning Electron Microscopy, it is seen that the degree of intercalation/exfoliation of the modified montmorillonite is higher than in the unmodified one. The mechanical properties also supported these findings, since in general, the tensile modulus, tensile strength, flexural modulus, flexural strength and impact strength of the composites with modified montmorillonite were higher than the corresponding properties of the composites with unmodified montmorillonite. The tensile modulus, tensile strength, flexural modulus and flexural strength values showed a maximum, whereas the impact strength exhibited a minimum at approximately 3-5 wt% modified montmorillonite content. These results imply that the level of exfoliation may also exhibit a maximum with respect to the modified montmorillonite content. The level of improvement in the mechanical properties was substantial. Adding only 3 wt% organically modified clay improved the flexural modulus of unsaturated polyester by 35%. The tensile modulus of unsaturated polyester was also improved by 17% at 5 wt% of organically modified clay loading.


Mechanical properties of unsaturated polyester/montmorillonite composites
Inceoglu, AB; Yılmazer, Ülkü (2001-11-29)
Nanocomposites composed of unsaturated polyester matrix and organically modified clay filler were prepared. After the synthesis, XRD patterns showed that the interlayer spacing expanded from 1.25 nm to 4.5 nm. The mechanical properties of the nanocomposites were determined and it was found that adding only 3 w/w % organically modified clay improved the flexural modulus of unsaturated polyester by 35%. From DSC diagrams, it was found that T-g values of the nanocomposites also increased with the clay content....
Synthesis, spectroscopic and electrochemical studies of perylene containing conjugated copolymers
Bayseç, Şebnem; Toppare, Levent Kamil; Yılmaz, Levent; Department of Polymer Science and Technology (2013)
The synthesis , spectroscopic and electrochemical properties of a series of donor-acceptor (DA) type polymers by changing the donor unit (thiophene, dithienopyrrole) polymer backbone were investigated.The synthesized CoP1 and CoP2 were designed to investigate the effect of copolymerization and insertion of perylene tetracarboxylic dimide (PDI) on the structure of benzotriazole (BTz) based polymers. For CoP1 1,7-dibromo-perylene diimide,4,7-dibromo-2-dodecyl-2H-benzo[d][1,2,3]triazole and 2,5 bis(tributylsta...
Synthesis and characterization of multi-hollow opaque polymer pigments
Asmaoglu, Serdar; Gündüz, Güngör; MAVİŞ, BORA; Colak, Uner (Wiley, 2016-08-05)
A new generation multihollow opaque polymer pigment was synthesized by suspension polymerization of water-in-oil-in-water emulsion method, where methyl methacrylate and ethylene glycol dimethacrylate monomer mixture was used as oil phase. The effects of surfactant and cosurfactant composition in terms of hydrophilic/lipophilic balance on the stability of the water-in-oil emulsion and the size of water droplets were studied. Low droplet sizes and the optimum stability were obtained with Span 80&Tween 80 surf...
Synthesis and characterization of aluminoborophosphate compounds by hydrothermal and solid-state methods
Karabıçak, Seher; Kızılyallı, Meral; Department of Chemistry (2004)
The hydrothermal and solid state methods were used in the synthesis of some aluminoborophosphate compounds. The products were investigated by using XRD, IR, DTA, DSC, ICP and SEM methods. The solid state reactions have been studied in the range 700 ا 1200?C. Using several hydrothermal methods a novel aluminum phosphate compound Al3-xBxP3O12 was synthesized. The crystal system was found to be tetragonal with a=17.1629 and c = 12.6084A° unit cell parameters and space group is P4212 (No:90). In anorthite miner...
Synthesis and structural characterization of Ni-B nanoalloys
Mut, Lütfiye Seda; Mehrabov, Amdulla; Toffoli, Hande; Department of Micro and Nanotechnology (2015)
Within the scope of this study, it is aimed to produce and to realize the structural characterization of Nickel Boron nanocrystalline/amorphous, alloy/intermetallic phase powders. Mechanical alloying by high energy ball milling was determined as production method. X-ray diffraction (XRD) for phase analysis, Scanning Electron Microscopy (SEM) for microstructure and morphological analysis, Vibrating Sample Magnetometer (VSM) for change in magnetic properties and Differential Scanning Calorimetry (DSC) for the...
Citation Formats
A. Inceoglu and Ü. Yılmazer, “Synthesis and mechanical properties of unsaturated polyester based nanocomposites,” POLYMER ENGINEERING AND SCIENCE, pp. 661–669, 2003, Accessed: 00, 2020. [Online]. Available: