توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Synthesis of polymeric beads with tunable size and porosity and their application in removal of Cr(VI)
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
In the present study we demonstrate a procedure, so–called polymerization in packed bed, for the production of polymeric beads with tunable size and porosity as well as their application in removal of hexavalent chromium. The adsorption was performed in batch mode and the adsorbent capacity was found to be about 120 mg Cr\g dry polymer. The experimental data from the batch binding assay could be described by Langmuir isotherm model. Moreover, scanning electron microscopy (SEM) was performed to examine the particles morphology<\div>

۲Investigation of Thermal Transition and Mechanical Properties of NR\SBR Composites Filled with Carbon Blacks and MWCNT
نویسنده(ها): ،
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۵
The effects of loading two different grades of carbon blacks (CBs) including highly structured CB, named SCCB, and conventional CB, i.e. N330, as well as multi–walled carbon nanotube(MWCNT), on the mechanical and thermal transition properties of natural–rubber(NR)\styrene–butadiene–rubber(SBR) blend with weight ratio of 60\40 were studied. Composites were compounded by two–roll mill and then cured by sulfur vulcanizing system using compression molding. The tensile properties and dynamic mechanical analysis (DMA) were examined. The tensile strength and modulus of the nanocomposites were improved as a result of incorporation of both CBs and MWCNT. However, the biggest improvements are relevant to SCCB and MWCNT. The results of DMA showed a single loss factor (tanδmax) along with a shoulder with no changes in the glass transition temperature (Tg), while the biggest decrease belongs to SCCB filled rubber. The results lead us to conclude that the bound rubber and occluded rubber governs the mechanical properties of CB filled rubber, while the higher mechanical properties along with big aspect ratio dominate the MWCNT filled rubber.<\div>

۳Dielectric Strength and Mechanical Properties of High–Density Polyethylene\Ethylene Vinyl Acetate\Organoclay Nanocomposite
اطلاعات انتشار: اولین همایش بین المللی و ششمین همایش مشترک انجمن مهندسی متالورژی ایران، سال
تعداد صفحات: ۷
A ternary dielectric is made of High Density Ployethylene (HDPE) and organoclay nanocomposites via mixing monomers of Ethylene Vinyl Acetate (EVA). This blending process is followed by application of the melt mixing method (using laboratory scale Brabender counter–rotating twin screw extruder). Its dielectric strength (as an important electrical property of any dielectric) was measured per ASTM D149 standard. It is shown that the electrical and mechanical properties of HDPE\EVA binary blend were enhanced significantly when organoclay was treated with EVA compound. This insulation material employed to insulate the adjacent core steel sheets of high voltage transformer<\div>

۴Influence of nanodiamond on network structure of NR\SBRrubber blend
نویسنده(ها): ،
اطلاعات انتشار: کنفرانس بین المللی مهندسی و علوم کاربردی، سال
تعداد صفحات: ۵
Nanodiamond as an emerging carbon based nanoparticle possess superior properties of bulk diamond including hardness and Young’smodulus, high thermal conductivity and chemical stability which are delivered at nanoscale. These properties combined with the largesurface area, stability of diamond core and reactive outer shell, makes nanodiamond an excellent candidate to use as filler material inpolymeric and elastomeric composites. In this study to investigate reinforcing mechanism of nanodiamond in elastomeric materials, thenetwork structure of natural rubber (NR) and styrene–butadiene rubber (SBR) blend was studied. Tube model theory is applied on stress–strainmeasurements to extract valuable information about the network structure of rubber including chemical crosslinks and physicalentanglements. Results showed that upon incorporation of ND rubber network has been altered significantly through increment in bothchemical and physical crosslinks. It is especially due to the rubber–filler interactions through strong linkages between functional groups on NDsurface and rubber chains which leads to improvement in mechanical strength of rubber vulcanizate.<\div>
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