Hossein Abedini

Hossein Abedini
Malek Ashtar University of Technology · mechanic

Master Student of Engineering

About

38
Publications
11,279
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472
Citations
Introduction
Hossein Abedini currently studied at the mechanic, Malek Ashtar University of Technology. Hossein does research in Mechanical Engineering and Naval Engineering. Their current project is 'Damage Analysis in composite Panels under Slamming Load'.

Publications

Publications (38)
Article
Polymerization of 1‐hexene was carried out using a mononuclear (MN) catalyst and two binuclear (BN1 and BN2) α‐diimine Ni‐based catalysts synthesized under controlled conditions. Ethylaluminium sesquichloride (EASC) was used as an efficient activator under various polymerization conditions. The highly active BN2 catalyst (2372 g poly(1‐hexene) (PH)...
Article
Full-text available
Effect of FeCl 3 and FeCl 3 /SiCl 4-doping on the performance of MgCl 2 (ethoxide type)/TiCl 4 /TEAL catalytic system was evaluated in the linear low density polyethylene (LLDPE) synthesis using 1-hexene as the comonomer. Results revealed that FeCl 3 /SiCl 4 modified catalytic system has better performance in terms of catalyst activity and comonome...
Article
Full-text available
In this work, we reported the development of a mini-reactor experimental setup for synthesizing of polypropylene with heterogeneous Ziegler–Natta catalysts in gas-phase. Use of pro-activated 4th generation of Ziegler–Natta catalyst and preheated monomer feed enabled the polymerization reaction to be carried out at constant temperature. Evaluation o...
Article
Full-text available
NBR, a copolymer of butadiene and acrylonitrile, is used for applications requiring resistance to petroleum oils and gasoline. So using NBR as a modifier in bitumen, resistance against the destruction of gasoline and diesel oil will be increased. In this work, rheological properties of bitumen emulsion modified with NBR latex have been investigated...
Article
A simplified moment model was developed and applied in prediction of long chain branching during peroxide modification of HDPE. Moments modeling with two different approaches were performed at different initiator concentrations. In the second developed simplified model, in addition to the prediction of average molecular weights (M⁠n and M⁠w) and co...
Article
Full-text available
The increase of the plastic wastes has urged finding different solutions for their recycling. Thermal pyrolysis is a suitable solution for refining the combination of different plastics. The main goal of this research is developing a model to predict the distribution of products obtained from pyrolysis. To do this a mechanism model based on free ra...
Article
A correlation, based on fluid mechanics, has been investigated for the mean particle diameter of crosslinked dextran microgels (CDMs) prepared via a water/oil emulsification methodology conducted in a single-stirred vessel. To this end, non-dimensional correlations were developed to predict the mean particle size of CDMs as a function of Weber numb...
Article
In this work, a mechanistic model was developed on the basis of population balance equations for butadiene emulsion polymerization and validated with experimental data in a batch reactor. A combination of finite difference and weighted essentially nonconciliatory (WENO) schemes was used as a precise technique for the discretization of the populatio...
Article
Seven Mg(OEt)2/FeCl3/SiCl4/TiCl4 type procatalysts supported on Mg(OEt)2/FeCl3 mixtures were prepared in order to unravel effect of Fe doping on the catalytic performance in ethylene polymerization. In polymerization experiments, the catalyst based on a support containing an optimum doping amount of 10 wt.% of FeCl3, i.e. C-F10-Si, exhibited an act...
Conference Paper
A detailed pseudo-bulk model has been used for prediction of conversion and particle size distribution (PSD) of vinyl acetate in a continuous emulsion polymerization reactor. Finite volume (FV) and moment techniques are applied for solving population balance equation under continuous operation. It is found that both methods can predict sustained os...
Article
The uniform curing of a complex-shape composite part can be guaranteed by implementing an optimized thermal cure cycle. An optimal cure cycle reduces the internal stresses generated during composite processing and leads to obtain a high-quality composite part in minimum processing time. In this paper, the optimal design of thermal cure cycle for th...
Article
Abstract In this study different water containing adducts, with MgCl2·nEtOH·mH2O formula, were synthesized through melt quenching method. After characterization of support samples, the final catalysts were prepared by reaction of the samples with TiCl4 and tested in slurry phase propylene polymerization. The prepared catalysts showed similar stereo...
Article
Because of nonresistance loading, stability of local network electricity frequency is very important in the alternative electricity generator. Since load consumer equipment would be damaged if the frequency is not in the allowable range, so the frequency fluctuation must be as low as it is possible. Non fluctuated frequency of diesel-electric alter...
Article
In this paper, semi-empirical relationships for calculating the electrical conductivities of sodium dodecyl sulfate (SDS) solutions in the presence of different concentrations of sodium carbonate and potassium persulfate (KPS), which are used in emulsion polymerization, are given. The results of these methods for predicting the electrical conductiv...
Article
This work is targeted to study emulsion polymerization of vinyl chloride monomer (VCM) using experimental and mathematical methods. To fulfill this goal, a computer code was developed on the basis of zero–one population balance by which the effects of initiator and emulsifier concentration on the evolution of VCM conversion were investigated in the...
Article
Utilizing response surface methodology, the conversion of vinyl chloride monomer (VCM) was monitored when the polymerization temperature, the type of surfactant, and the weight ratio of water-to-monomer (W/M) were taken as the emulsion polymerization variables. Because the homogeneous nucleation was found to be the dominant mechanism in VCM emulsio...
Article
Full-text available
In this article, the kinetic behavior of a glass/epoxy prepreg, HexPly (R) 1454, has been investigated using differential scanning calorimetry data. The kinetic parameters of three different kinetic models have been calculated using non-linear curve fitting of isothermal differential scanning calorimetry data. Curve fitting was done based on geneti...
Conference Paper
The purpose of this research was to propose a new mathematical model for a silicone rubber-based, monolithic drug delivery device containing Progesterone (PRO) and Estradiol Benzoate (EB). The devices were designed as implantable ones and comprised of a solid, cylindrical neat silicone rubber core coated with a drug-eluting sheet made of the same m...
Article
Changes induced in the molecular architecture of linear low‐density polyethylene during early stages of peroxide modification in a microcompounder are monitored by means of size exclusion chromatography and dynamic shear oscillatory measurements as a function of peroxide concentration, mixing temperature and resident time. By the use of a response...
Article
Full-text available
Different parameters including temperature and amount of titanium tetrachloride (TiCl4) were examined with respect to Ziegler-Natta catalyst morphology and the catalyst performance during its preparation process. The results show that optimum catalyst activity and morphology are achieved when the process is carried out in two stages. In the first s...
Article
In this article, the optimal design of the thermal cure cycle of a prepreg material has been presented. Three different kinetic methods have been considered to determine the kinetic parameters of the curing reaction of an epoxy/glass prepreg. The capability of these kinetic models in simultaneously predicting kinetic parameters in isothermal and no...
Article
The kinetic parameters of the curing reaction of epoxy/glass prepreg have been evaluated and predicted by three different methods using the non-isothermal differential scanning calorimetry (DSC) data. In the first method, the dependence of activation energy, pre-exponential factor and reaction model on the extent of conversion have been calculated...
Article
Full-text available
Objective: The authors sought to determine whether antidepressant therapy could enhance the efficacy of dermatological treatment in alopecia areata patients who suffer from major depressive disorder. Methods: Sixty patients were enrolled in the study. Thirty patients with alopecia who were diagnosed with major depressive disorder received 20 mg/...
Article
Full-text available
In this work, the method of moments is used for solution of population balance equations appearing in modeling of emulsion polymerization (EP). The zero-one model without coagulation effect and the pseudo-bulk model including coagulation effect are investigated as two common approaches for modeling EP processes. The fixed quadrature method is used...
Article
Dynamic simulation and control of a two-stage continuous bulk styrene polymerization process is developed to predict the performance of auto-refrigerated CSTR and tubular reactors. The tubular reactor is subdivided into three temperature-control jacket zones. In this paper temperature control of auto-refrigerated continuous stirred tank reactor and...
Article
Transreactions of PET and PEN melt-mixed in a twin-screw extruder are investigated. The extruder is modeled and characterized in the frame of a tubular system of closed type. The kinetic modeling is based on a modified second-order reversible reaction equation, which allows the dispersion equation to be solved analytically. The analysis shows a goo...
Article
The critical micelle concentration and the effective degree of dissociation of micelles (α) of sodium dodecyl sulfate, which is the most extensively used surfactant in emulsion polymerization systems, were determined in the presence of various amounts of sodium carbonate and potassium persulfate, and some monomers, such as methyl methacrylate, buty...
Article
Macroporous styrene-divinylbenzene copolymers with different degree of crosslinking were prepared by suspension polymerization in presence of different binary mixtures of toluene and heptane, as diluent. Specific surface area, bulk and apparent densities, and pore volume of the resulting beads were determined experimentally. Applying the least squa...
Article
In this paper, an industrial linear low density polyethylene (LLDPE) production process including two serried fluidized bed reactors (FBR) and other process equipment was completely simulated in steady state mode. Both of FBRs were considered like two serried continuous stirred tank reactors (CSTR). In this simulation, a kinetic model that is based...
Article
The transesterification of PET and PEN in a twin-screw extruder (TSE) was investigated. A theoretical model, able to predict the extent of transesterification reaction (X) and degree of randomness (RD) against processing parameters along the screw axis is presented. PET/PEN blends were prepared via the melt mixing process. The axial dispersion mode...
Article
In this work, simultaneous inferential control of particle size distribution (PSD) and molecular weight distribution (MWD) in a semi-batch emulsion polymerization reactor of styrene has been addressed. Using a comprehensive dynamic model for PSD and MWD predictions and performing a sensitivity analysis, it has been revealed that free surfactant and...
Article
Effects of initiator and surfactant concentrations and temperature on styrene conversion and polymer particle size distribution (PSD) in a batch emulsion polymerization are investigated through simulation and experimental studies. The detailed model based on population balance (zero-one model), accounting for nucleation, growth and coagulation phen...
Article
Full-text available
This paper considers the modeling and control of a tubular fixed bed reactor with recycle stream for dimethyl ether (DME) production. For simulation purposes, a pseudo homogeneous model has been developed. By reactor simulation under steady state con-dition, effects of parameters such as feed rate, pressure and shell temperature are investi-gated....
Article
An improved non‐isothermal kinetic model was developed based on mass balance and Arrhenius laws using a second‐order reversible reaction capable of predicting the extent of transesterification reaction ( X ) and the degree of randomness ( RD ) in poly(ethylene terephthalate) (PET)/poly(ethylene naphthalene‐2,6‐dicarboxylate) (PEN) blends prepared b...
Article
In this work, a new control strategy for controlling the particle size distribution (PSD) in emulsion polymerization has been proposed. It is shown that the desired PSD can be achieved by controlling the free surfactant concentration which in turn can be done by manipulating the surfactant feed rate. Simulation results show that the closed-loop con...
Article
Full-text available
For large and complex reacting systems, computational efficiency becomes a critical issue in process simulation, optimization and model-based control. Mechanism simplification is often a necessity to improve computational speed. We present a novel approach to simplification of reaction networks that formulates the model reduction problem as an opti...
Article
Shape memory was induced in crosslinked low‐density polyethylene by a heating‐stretching‐cooling cycle. The effect of crosslink content on thermal properties and temperature dependence recovery behavior was studied experimentally. The importance of stretching temperature and crosslink content on recovery behavior could be reasonably explained by th...
Article
Particle size distribution determines the major end-use properties of latex produced by emulsion. Therefore simulation and control of particle size distribution are important in emulsion polymerization. The investigated system is styrene polymerization. The model for determination of particle size distribution is based on population balance, accoun...

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