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Register a new userStudying the Morphology & Fire behavior of Poly(ethylene terephthalate)/Polycarbonate Blends
دراسة شكل و بنية و سلوك احتراق خلائط البولي إثيلين ترفثالات مع البولي كربونات
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في هذا البحث تم دراسة تأثير كل من شكل و بنية و تجانس خلائط البولي إثيلين ترفثلات المعاد تدويره (PET) مع البولي كربونات المعاد تدويره (PC) على تفاعل الاحتراق لهذه الخلائط.
In the present paper, we study the effect of both morphology and compatibilization on the reaction to fire of blends of recycled poly(ethylene terephthalate) (PET) with recycled polycarbonate (PC).
References used
Roeder J, Oliveira RVB, Becker D, Goncalves MW, Soldi V, Pires ATN, 2005 - Compatibility effect on the thermal degradation behaviour of polypropylene blends with polyamide 6, ethylene propylene diene copolymer and polyurethane. Polymer Degradation and Stability, 90(3):481
Lizymol PP, Thomas S, 1997 - Flame retardant properties of binary blends: a comparison of miscible and immiscible blends. Polymer Degradation and Stability, 57(2):187
Renaut N, Duquesne S, Zanardi S, Bardollet P, Steil C, Delobel R, 2005 - Fire retardancy, thermomechanical and thermal properties of PP/PC blends. Journal of Macromolecular Science Part A Pure and Applied Chemistry, 42:977
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In the present work, the rheological and mechanical properties of
polypropylene /thermoplastic starch (PP/TPS) and acrylonitril-butadienestyrene/
thermoplastic starch (ABS/TPS) blends were investigated. Starch was
plasticized using glycerol, and b
lends were prepared using a laboratory scale
with single screw extruder. Rheological properties of the prepared blends were
determined using a capillary rheometer. Mechanical properties were studied in
term of tensile tests, stress at break, strain at break and Young's modulus were
determined.
The rheological behaviour in the molten state of Acrylo nitril– Butadine –
Styrene (ABS) according to temperature, shearing stress and shearing rate
have been studied. Measurements were made with a capillary viscosimeter for
the static properties.
The correction of experimental data has been carried out.
Viscosity decreases with increasing shear stress or shear rate in the nonnewtonian
flow high polymer systems. However, the variation of activation
energy with temperature at fixed shear rate is always less then at fixed shear
stress.
Video image data can be analyzed and processed in many ways. This research explores the extent at which spiking neurons, which are designed along the Hodgkin-Huxley model, are suitable for this task. The simulations reported in this research
consid
er integrate-and-fire neurons constant and alternating input currents, as well as pixel-intensity driven inputs. Currently, the simulation software employs 64 independently operating spiking neurons that process image data taken every 25 ms. In order to define the response of these neurons, the experiments were done on 100 digital images which include different illuminations, contrast, and saturation situations. The results show that the integrate-and-fire-neuron is highly sensitive to the changes in the intensity of pixels if its parameters are properly set. So in many applications, such as "Saliency Maps", which highly depend on the intensity values of a set of pixels, a neural network made of this neuron will perfectly fit.
This paper aims to calculate regular classical and complementary, so regular total Ignaczak solutions coupled with temperature field ,occupying R3 , and with vanishing stresses and temperature on the boundary.
Some kinetic parameters have been determined in this work for thermal and catalytic
cracking of the mixed of polyethylene and polypropylene using batch method. The
cracking reaction was carried out at different temperature 470,490 and 510oC under
atmospheric pressure. The mass of products (liquid and gas fractions) were determined and
used to plot the curves of the thermal and catalytic decomposition. We used two types of
catalysts: Syrian natural Zeolite and the same after loading with sulfate ions using
impregnation method. The thermal cracking has a long time and has firs-pseud order
reaction. While in the case of catalytic process we note that the reaction finished in the
short time and the process is the Zero-pseud order reaction. The rate of the cracking
increased very much, the rate constant was k1=0.0032.min-1 in the thermal cracking at
4700C and ko=0.111.min-1 in the case of catalytic cracking in presence of Z catalyst and
ko= 0.206 min-1 in presence of 15-SO4
2-/Z as catalytic at the same temperature. In the other
hand activation energy was 208.7 kj/mol in the thermal process and decreased to 116.6
kj/mol at Z catalytic presence and to 87.3 kj/mol at 15-SO4
2-/Z catalytic presence.
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