توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Kinetic study of styrene – butadiene rubber (SBR) epoxidation with Dimethyldioxirane (DMD) and phase transfer catalysis method
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۶
The epoxidation of Styrene – butadiene rubber (SBR) is carried out in chloroform \acetone\water solution using in situ – generated dimethyldioxirane as oxidant in presence of phase transfer catalyst (PTC). The process of reaction is monitored by 1HNMR spectroscopy. It was demonstrated that the epoxidation of SBR is second order and corresponds to a first order to the content of double bonds. The rate constant as well as the activation energy was established.<\div>

۲SURFACE MODIFIED HEXAGOBAL BORON NITRIDE AS PROPER NANOFILLER FOR THERMAL MANAGEMENT APPLICATIONS
اطلاعات انتشار: سومین همایش ملی تکنولوژی های نوین در شیمی، پتروشیمی و نانو ایران، سال
تعداد صفحات: ۵
Hexagonal boron nitride (h–BN) nanosheets have been widely used to create fluids for thermal management applications due to their high thermal conductivity. For better dispersion, h–BN nanosheets were functionalized with hexadecylamine (HDA) to induce the exfoliation of the layered structure of h–BN. It is expected that surface modification provides good compatibility and a good dispersion of h–BN nanosheets in oil–based nanofluid and enhances its thermal conductivity. Modification of h–BN nanosheets was characterized by fourier transform infrared (FT–IR) and thermogravimetric analysis (TGA). Also, the attachment of HDA modifier agent on the surface of h–BN nanosheets was studied using X–ray diffraction (XRD). FT–IR and TGA results indicated that HDA was successfully grafted onto the h–BN nanosheets. In addition, the morphology and crystalline structure of h–BN nanosheets before and after the modification processes were studied by scanning electron microscopy (SEM) and XRD, respectively. The oil–based nanofluid containing 0.05% h–BN nanosheets shows an improvement in thermal conductivity, 36% higher than that for pristine oil<\div>
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