رفتار پلاروگرافی هیدروکسی آن تراکینونهای طبیعی نظیر کریزوفانول امودین و رئین در حضور الکترولیت زمینه پی پریدینیوم پرکلرات m 75ˆ0 و پی پریدین m 25ˆ0 مورد مطالعه قرار گرفته است براساس نتایج بدست آمده روش ac و dc پلاروگرافی برای اندازه گیری ترکیبات فوق پس از استخراج به کار رفته است . همچنین کارآئی روش ac پلاروگرافی برای اندازه گیری آنتراکیونهای محلول در آب (گلی گوزیدهای آنتراکینونی) پس از هیدرولیز...

برای بدست آوردن ثابت تشکیل یک کمپلکس روشهای متعددی وجود دارد. که از جمله آنها می توان به روشهای اسپکتروسکوپی، الکتروشیمیایی و سطحی اشاره کرد. با توجه به دقیق بودن مشکلات استفاده از روشهای دیگر به دلیل ماهیت مواد مورد استفاده ما ترجیح دادیم که از روش هدایت سنجی استفاده نمائیم. موادی که برای بررسی انتخاب شده بودند عبارت بودند از: 1) - هسته کمپلکس شامل پیریدینیوم، -2متیل پیریدینیوم و 2، -4دی متیل ...

Ammonium perchlorate (AP) is considered as a strong oxidizer in solid propellants. Therefore, its thermal decomposition characteristics directly influence the combustion behavior of solid propellants. The AP particle size, shape, and morphology influence on the thermal behavior. In this study, the solvent anti-solvent crystallization method equipped with an eductor mixer was used as a system fo...

Nanoparticles (NPs) tend to agglomerate consequently their catalytic activities decrease during propellant operation. Therefore, loading the nanoparticles onto the support is a general method to prevent the agglomeration and maintain the catalytic activities of the nanoparticles. Three dimensional (3D) graphene has high surface area and porous structur. Furthermore,, 3D-graphene is an efficient...

Background and Objectives: Perchlorate, as an emerging contaminant, has attracted notice of the most individuals and organizations. Presence of perchlorate in the human body can lead to inappropriate regulation of metabolism in adults. Moreover, due to inhibition of iodide uptake in the thyroid gland, it causes neurological and behavioral problems in infants and children. United States Environm...

In this study, the effect of copper chromite (CuO.Cr2O3) nanoparticles and multi-walled carbon nanotubes (MWCNTs) as nanocatalysts on the thermal decomposition behavior of ammonium perchlorate (AP) has been investigated using Differential Scanning Calorimetry (DSC). At first, copper chromite (CuO.Cr2O3) nanoparticles were prepared by inverse co-precipitation method. In this method, cupric nitra...

Abstract: Oxidizer constitute most part of propellant and ammonium perchlorate is most used oxidizer in solid propellant among other oxidizer. Coating is one method to prevent agglomeration of ammonium perchlorate or to create other desirable properties on ammonium perchlorate. Usually type of coating agent and method of coating are selected on base of purpose of coating. Target of coating per...

In this review, an attempt to collect summarized literature data on catalytic effect of nanosized metal oxides on the thermal decomposition of ammonium perchlorates is made. Several experimental results show nanometal oxides are more effective catalysts as compared to nanosized metals. Nanocatalysts decrease the activation energy and the increase the rate the thermal decomposition of ammonium p...

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