توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Thermal and impact study of PP\PET fiber composites compatibilized with Glycidyl Methacrylate and Maleic Anhydride
نویسنده(ها): ،
اطلاعات انتشار: دومین کنفرانس بین المللی کامپوزیت، سال
تعداد صفحات: ۱۲
In this paper, two grafted copolymers, Glycidyl Methacrylate grafted PP (PP–g–GMA) and Maleic Anhydride grafted PP (PP–g–MA), were used in polypropylene (PP) reinforced with poly (ethylene terephthalate) (PET) fiber composites. The composites were prepared by melt impregnation technique using a Brabender internal mixer. The composite strength results showed enhancement for both of modified composites up to 10wt% and this growth was bigger for GMA modified samples. The results of torque mixing supported the occurrence of compatibilization reaction between epoxy groups of GMA modified PP and PET end groups (hydroxyl and carboxyl). Heat deflection temperature (HDT) results of GMA modified composites revealed more enhancement than HDT of MA modified ones. DSC thermograms showed bigger area of melting peak for unmodified samples and it was found bigger area of melting peak for GMA modified composite than MA one’s. Transcrystallization (TC) of PP on PET fibers was investigated using a polarized optical microscope which revealed no TC for neither of modified composites at the fiber\matrix interface. The morphological analysis of GMA modified PP\PET composites pointed out a marked improvement of fiber dispersion and interfacial adhesion as compared to non–compatibilized PP\PET composites. It was perceived that strain at break tend to decrease by adding PET fibers and that decrement was more for modified samples. The impact strengths of composites versus fiber wt% were greater for unmodified composites up to 15 wt% of fibers due to having weaker interface. The impact results also disclosed that using either of these modifiers reduces the impact strength at low fiber percentages. According to linear elastic fracture mechanics (LEFM), toughness (GC) and stress intensity factor (KC) were evaluated for theses composites based on the fracture energy obtained from impact tests.<\div>

۲Fuzzy Multi–objective Reactive Power Clearing by a fuzzy adaptive PSO approach
نویسنده(ها): ، ، ،
اطلاعات انتشار: نوزدهمین کنفرانس مهندسی برق ایران، سال
تعداد صفحات: ۶
This paper presents a fuzzy multi–objective approach for clearing the reactive power market. The object functions that have been studied are the total payment function (TPF), voltage stability and the voltage deviation of the buses. All of the object functions are transformed to membership functions and then a pseudogoal function is derived to express a unique object function. The proposed reactive market is implemented to the IEEE 30–bus system<\div>

۳Application of Arrhenius–type constitutive equation for modeling of bulk metal forming processes
اطلاعات انتشار: دوازدهمین کنفرانس ملی مهندسی ساخت و تولید ایران، سال
تعداد صفحات: ۵
In the present research, the ring compression test was utilized for evaluating the flow behavior of AZ80 magnesium alloy under three different temperatures and deformation rates. The parameters of Arrhenius type (Zener–Holloman–dependent) constitutive model for this alloy were determined using the results of the ring compression tests together with an optimization approach by employing Genetic Algorithm. As a case study, the non–equal channel lateral extrusion (NECLE) process was simulated using the determined parameters of the of Arrhenius type material model. Finally the load–displacement curve of the FE simulation was compared with the experimental load curve. A good agreement was observed between these curves.<\div>

۴Optimization of curved sandwich panels with Magneto–Rheological fluid layer using improved high order sandwich panel theory
اطلاعات انتشار: کنفرانس دو سالانه بین المللی مکانیک جامدات تجربی، سال
تعداد صفحات: ۱۹
Sandwich structures perform an important role in structures because of the ratio of the bending stiffness to the weight. Magneto–Rheological Fluids are one kind of the smart materials which are suspensions of micrometric magnetic particles in a carrier fluid typically oil. When the magnetic field is applied to viscosity of the fluid increases and the fluid becomes like a viscoelastic material. Energy method is used to derive the equation of motion. In this paper, a single and multi–objective optimization of the panel for the first modal loss factor and the weight of the panel with isotropic and composite face sheets is conducted by using of Genetic Algorithm and Particle Swarm Optimization and the pareto optimal solutions. Also, present paper intends to represent an optimized design of the composite sandwich panel with MR smart oil layering via HOT for the first time.<\div>

۵Application of Composite Hydrogel of Clinoptilolite crosslinked wheat Straw–g–Potassium Acrylate to Dye Sorption
نویسنده(ها): ، ، ،
اطلاعات انتشار: هفتمین کنگره ملی مهندسی شیمی، سال
تعداد صفحات: ۷
A composite hybrid hydrogel was prepared by incorporating the zeolite (natural surfactant modified clinoptilolite) into a graft poly (potassium acrylate) on wheat straw powder hydrogel by the in situ polymerization method using N,N'–methylene bisacrylamide as organic cross–linker.The dye sorption\adsorption properties of this hybrid hydrogel were investigated. The adsorptions of MB dye (as a cationic dye) by the hydrogel increases as the loading of the clinoptilolite particles and dye concentration increases. The hybrid hydrogel and hydrogel without any inorganic particle were investigated by FTIR. SEM and XRD were used to characterize the crystalline and microstructure of hybrid and organic hydrogels<\div>

۶New Optically Actives Polymers Based on N–Trimellitimido–L–phenyl alanine: Synthesis and Properties
نویسنده(ها): ، ،
اطلاعات انتشار: علوم و تكنولوژي نساجي، سال
تعداد صفحات: ۱۰
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