Contribution of Nanoclays to the Performance of Traditional Flame Retardants in ABS

Ozkaraca, Ayse Cagil
Kaynak, Cevdet
The purpose of this study was to investigate contribution of nanoclays to the flame retardancy performance of a traditional brominated flame retardant compound with various combinations of antimony trioxide and zinc borate. The matrix polymer acrylonitrile butadiene styrene (ABS) was compounded by melt mixing in a laboratory size twin-screw extruder. X-ray diffraction analysis and transmission electron microscopy revealed that nanoclay silicate layers were mainly intercalated with certain level of exfoliation in ABS matrix. Flammability analysis investigated by mass loss calorimeter, limiting oxygen index, and UL-94 tests indicated that use of nanoclays improved all flame retardancy parameters significantly. For instance, the increase in the limiting oxygen index was up to 32% O-2, while the suppression in peak heat release rate value was as much as 82%, of course in each specimen the highest rating of V-0 in UL-94 test was obtained. Thermogravimetric and other residue analyses pointed out that these contributions were especially due to the condensed phase flame retardancy mechanism of nanoclay which contributes stronger and carbonaceous char formation acting as a barrier to heat and flammable gases and retarding volatilization via tortuous pathway. POLYM. COMPOS., 2012. (c) 2012 Society of Plastics Engineers


Influences of three different ethylene copolymers on the toughness and other properties of polylactide
MEYVA, YELDA; Kaynak, Cevdet (Informa UK Limited, 2016-01-01)
The aim of this study was to investigate influences of three different ethylene copolymers on the toughness and other properties of very brittle biopolymer PLA (polylactide). For this aim, PLA was melt blended by twin-screw extruder with various amounts of ethylene vinyl acetate (EVA), ethylene-methyl-acrylate (EMA) and ethylene-n-butyl acrylate-glycidyl-methacrylate (EBA-GMA). SEM and DSC analyses indicated that these ethylene copolymers were thermodynamically immiscible with phase separation in the form o...
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Polat, Özlem; Kaynak, Cevdet (Carl Hanser Verlag, 2019-03-01)
In this study, the flame retardancy contribution of zinc borate when used together with a traditional flame retardant (aluminum diethylphosphinate compound) was investigated for neat polyamide-6 and for 15 wt% short glass fiber reinforced composite. Melt mixing with twin-screw extrusion was the compounding method while injection and compression molding were the shaping methods of specimens. Three different flammability tests (limiting oxygen index, UL-94 vertical burning, mass loss calorimetry) indicated th...
Influence of Zinc Oxide on Thermoplastic Elastomer-Based Composites: Synthesis, Processing, Structural, and Thermal Characterization
ÇELEBİ, HANDE; Bayram, Göknur; DOĞAN, AYDIN (Wiley, 2016-08-01)
It was aimed to investigate how thermal conductivity and stability properties of synthesized thermoplastic elastomers were influenced by zinc oxide (ZnO) additives which differed in size and surface treatment. ZnO particles were prepared by the homogeneous precipitation method by mixing aqueous solutions of hexamethylenetetramine (HMT) and zinc nitrate. The obtained particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Poly(v...
Synthesis of conducting polysiloxane-polypyrrole graft copolymers
Gunaydin, O; Toppare, Levent Kamil; Yagci, Y; Harabagiu, V; Pintela, M; Simionescu, BC (Springer Science and Business Media LLC, 2002-02-01)
Polysiloxane-polypyrrole graft copolymers have been synthesized by a series of chemical reactions and subsequent electropolymerization. First, the hydrosilation of 4-vinyl aniline by dimethyl-methylhydrosiloxane copolymer gave the corresponding aminophenyl functional polydimethylsiloxane (PDMS-NH2). The side chain pyrrole functionalized. polysiloxanes were then prepared by the reaction of PDMS-NH2 with glycidylpyrrole. Finally, the synthesis of graft copolymers of polysiloxane and pyrrole has been achieved ...
Effect of N-methyl imidazole and dimethyl pyrazole ligands on polymerization of di(2,4,6-trichlorophenolato)Cu(II)/Co(II) complexes in solid state
Kisakurek, D (Informa UK Limited, 2004-08-01)
Polymerization of 2,4,6-trichlorophenol (TCPH) was achieved through the thermal decomposition of the copper and cobalt complexes of TCPH with N-containing ligands [N-methyl imidazole (NMIz) and 3,5-dimethyl pyrazole (DMPz)). The structural analysis of the complexes was performed by using Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), mass (MS), UV-VIS, diffuse reflectance (DRS) and electron spin resonance (ESR) spectroscopies, magnetic susceptibility balance and elemental analys...
Citation Formats
A. C. Ozkaraca and C. Kaynak, “Contribution of Nanoclays to the Performance of Traditional Flame Retardants in ABS,” POLYMER COMPOSITES, pp. 420–429, 2012, Accessed: 00, 2020. [Online]. Available: