توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Study on the effect of re–modification of MWCNT on the rheological properties of epoxy\CNT nanocomposites
نویسنده(ها): ، ، ،
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
In the present work, we report on the chemical surface modification of carboxylated multiwalled carbon nanotubes (MWCNTs) by means of oligomeric unsaturated aliphatic hydroxyl terminated polyester.The population of remodified sites on the surface of MWCNTs were investigated by Fourier Transform infra–red spectrometry (FTIR).The surface modified CNTs were embedded in epoxy resin by ultra–sonication and the cured nanotube containing composites were characterized by transmission electron microscopy(TEM). Rheological properties of remodified CNT\epoxy composites confirmed that the remodified CNTs were well dispersed in the epoxy resin and had strong interaction with the polymer matrix<\div>

۲The evaluation and optimization of Impact Strength of PP\PC\SEBS Ternary Blends by Using Taguchi Methodology
نویسنده(ها): ، ، ،
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
The paper deals with polypropylene (PP)\poly (styrene–b–(ethylene–co butylene)–b–styrene) tri–block copolymer (SEBS)\polycarbonate (PC) ternary blends in which, the impact strength is studied using L9 nominal Taguchi methodology. First of all, nine samples are produced at different processing conditions within a twin screw extruder, in accord with L9 design. Three nominal processing parameters were die temperature, screw speed, and order of mixing which were changed based on L9 Taguchi experimental design; then, the impact strength of the produced samples was considered as the responding variable. By analyzing the impact data regarding with either mean or interactive effects by using Taguchi analysis, it is observed that the impact strength of the PP\SEBS\PC ternary blends is not affected by die temperature significantly, whereas screw speed and blending sequence showed major contribution on it. Consequently, the best sample regarding to highest impact strength toward such ternary systems, was identified optimization of experimental data, on the basis of L9 methodology.<\div>

۳Reactive Compatibilization of Polyamide–6\Polycarbonate Blends by using Maleated SEBS
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
The work deals with compatibilization of polyamide–6 (PA–6)\polycarbonate (PC) systems by using maleated poly [styrene–b–(ethylene–co–butylene)–b–styrene] triblock copolymer (SEBSg– MA). In particular, the interset was to study the role of such compatibilizer toward morphology and mechanical properties of the incompatible polymer blends of PA–6\PC. Here, incorporation of reactive SEBS–g–MA and unfunctionalized SEBS, namely reactive compatibizing system, has been found to provide significant improvement toward mechanical properties of the PA–6\PC blends. In addition, scanning electron microscopy (SEM) studies showed that the encapsulation of SEBS around the PC domains becomes gradually incomplete while using SEBS–g–MA and unfunctionalized SEBS, simultaneously, throughout the PA–6 rich phase. Also, the SEBS dispersed domains within the PA–6 matrix progressed with increasing the ratio of unfunctionalized SEBS to SEBS–g–MA. However the encapsulation was incomplete, maximum impact strength and maximum strain at break in tensile test were achieved when certain weight ratio of SEBS–g–MA to SEBS were employed.<\div>

۴SEBS–g–MAH compatibilizer precursor for PP\PC\SEBS Ternary Systems
نویسنده(ها): ، ، ،
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
This paper presents the effect of maleated SEBS compatibilizer precursor on the morphology and mechanical properties toward polypropylene (PP)\polycarbonate (PC)\ poly (styrene–b– (ethylene–co–butylene)–b–styrene) (SEBS) 70\15\15 w\w\w ternary systems. Two disperse phases are consisting of 15wt% of PC and 15 wt% of reactive (maleic anhydride grafted) and non reactive SEBS mixtures which are prepared in a co–rotating twin screw extruder. Scanning electron micrographs prepared by morphological study showed that the blends containing only non–reactive SEBS exhibited a fine dispersion of core–shell particles. In rest of samples, all including reactive compatibilizer precursor, by decreasing the SEBS \ SEBS–g–MAH weight ratio, the blend morphology changed from the core–shell particles to a complex system containing composite droplets, rod like structures and individual particles. In fact, the mechanical properties were considerably affected by variations in the phase morphology which could be attributed to the formation of those especial microstructures revealed by the morphological characterizations<\div>

۵Morphology Evolution through HDPE\PA–6\EVOH Ternary Blends: The Effects of Temperature and Composition Ratio
نویسنده(ها): ، ، ،
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
We performed an experimental– theoretical study concerning with morphology development through HDPE\PA–6\EVOH ternary polymer blends. In case, the effect of temperature and composition ratio of dispersed phases are considered as the thermodynamic and material parameters. Accordingly, based on interfacial energy contribution, by increasing PA–6 to EVOH weight ratio within HDPE matrix, there is an increase in the particle size of composite droplets, based on what calculated upon theoretical predications.<\div>
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