بیات, یداله
دانشگاه صنعتی مالک اشتر
[ 1 ] - سنتز و بررسی خواص الاستومری کوپلیمر سه دسته‌ای انرژی‌زای GAP-PB-GAP
The binder is an essential ingredient of solid composite propellants. Today, the industrial military scientists have been focused on finding and developing the new energetic binders to enhance the performance of the composite propellants. In this research, triblock hydroxyl-terminated polybutadiene (HTPB) with Glycidyl azide polymer (GAP) was synthesized as a new energetic binder. In the first ...
[ 2 ] - بهبود بهره سنتز گلیسیدیل نیترات در حضور کاتالیزور‌های مختلف
Glycidyl nitrate is a valuable chemical used for manufacturing poly (glycidyl nitrate) as an energetic polymer. In this study glycidyl nitrate was synthesized by ring opening reaction of epichlorohydrin by nitric acid as nitrating agent in the presence of several different catalysts, and the effect of different catalysts on one pot synthesis of glycidyl nitrate was evaluated. The main purpose o...
[ 3 ] - سنتز کوپلیمر تری بلاک پلی کاپرولاکتون-پلی گلیسیدیل نیترات-پلی کاپرولاکتون به عنوان پلی ال در بایندر پیشرانه
Binders in composite propellants have a crucial role to affect the physical and thermochemical properties. So it is necessary to choose the binder ingredient appropriately. The suitable binders have a high solid loading, good mechanical and process ability properties. Polycaprolactone due to the polar groups in their structures are able to mix with other nitrate esters. At this point of view, t...
[ 4 ] - سنتز 10،4-دی‌نیترو 12،8،6،2- تترااکسا 10،4-دی‌آزاایزوورتزیتان در حضور مایعات یونی
4, 10- Dinitro-2, 6, 8, 12- tetraoxa-4, 10- diazaisowurtzitane (TEX) is well known as an efficient Insensitive high explosive. It was usually prepared via nitration of 1, 4- diformyl- 2, 3, 5, 6- tetrahydroxy piperazine reaction using a mixture of fuming nitricacid and concentrated sulfuric acid. However, these traditional liquid acids are toxic, corrosive and produce hazardous waste. In additi...
[ 5 ] - ارائه روش‌های جدید برای حذف بنزیل از ترکیب 12،8،6،2- تترااستیل- 10،4 - دی‌بنزیل- 12،10،8،6،4،2- هگزاآزاایزوورتزیتان
CL-20 is one of the well-known non-nuclear powerful energetic materials. TADB is an important intermediate in synthesis of CL-20. One of the significant steps in synthesis of CL-20 is application of palladium catalysis for debenzylation of TADB which has some disadvantages such as the high cost, need to special reactor and high cost and need to especial reactor, therefore scientists to find a...
[ 6 ] - بررسی روش های بهبود چسبندگی عایقEPDM به سوخت جامد بر پایه پلی یورتان(علمی-ترویجی)
عایق های بر پایه ترپلیمر اتیلن- پروپیلن- دی ان مونومر ((EPDM در صنایع موشکی کاربرد وسیعی دارند با این حال به لحاظ ساختار غیر قطبی آن، تلاش برای بهبود چسبندگی EPDM به سوخت جامد کامپوزیت بر پایه پلی یورتان از چالش های بزرگ صنعت مذکور می باشد. در این مقاله پارامترهای موثر در چسبندگی عایق به سوخت جامد بر پایه پلی یورتان مرور شده، روش های اصلاح سطح و توده عایق حرارتی بر پایه EPDM مطرح و پیشنهادهایی ...
[ 7 ] - سنتز 5،3،1-تری آمینو2،4،6-تری نیترو بنزن کاتالیز شده بوسیله هترو پلی اسیدها(علمی-پژوهشی)
Abstract: The aim of this research is to provide a convenient and relatively inexpensive preparation method for synthesis of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). TATB is a reasonably powerful explosive in which ts thermal and shock stability is considerably greater than that of any other known energetic material. It is used in military applications because of its significant insensitiv...
[ 10 ] - سنتز 2،4،6،8،10،12- هگزابنزیل-2،4،6،8،10،12- هگزاآزاتتراسیکلو ]9,05،11,03،0،5،5[ دو دکان با استفاده از کاتالیست‌های جدید
CL-20 is the most energetic conventional explosive available for military use. The over all aim of the high energy material research community is to increase the yield and reduce the cost of CL-20 synthesis. All synthetic methods used to prepare the CL-20, depended on the condensation reaction of benzylamine with glyoxal for the preparation of HBIW intermediate . In the presence of HCOOH cata...
[ 11 ] - سنتز و بررسی خواص ترکیب جدید پرانرژی (5-آمینوتترازول-1-ایل)-استیک‌اسید-2،2-دی‌نیتروپروپیل استر
Aminotetrazoles are derivatives of the tetrazole with unique properties. Although they have high heat of formation, but they show very high thermal stability. Aminotetrazoles have high nitrogen content among organic compounds and are very suitable in Propellant, gas generator and explosive formulation. In this paper, a new energetic and stable compound (5-Amino-tetrazol-1-yl)-acetic acid 2,2-...
[ 12 ] - Investigation of the Properties of Polyurethane Elastomer Based on Synthesis and Characterization of PTHF-GAP-PTHF Triblock Copolymer
Binder has a key role in the performance of composite propellants. The binders are classified into two neutral and high-energy categories. GAP is one of the most important energetic binders, but it has poor mechanical and thermal properties. The goal of this investigation is to improve the properties of GAP by copolymerizing it with polytetrahydrofuran. New energy triblock copolymer was synthes...
[ 13 ] - سنتز و مشخصه یابی کوپلیمر سه دسته‌ای بر پایه پلی گلیسیدیل آزید
Binder has a key role in the performance of composite propellants. The binders are classified into two neutral and high-energy categories. GAP is one of the most important energetic binders, but it has poor mechanical and thermal properties. The goal of this investigation is to improve the properties of GAP by copolymerizing it with polycaprolactone. New energy triblock copolymer was synthesize...
[ 14 ] - بررسی خواص مکانیکی و ضربه ویژه پیشرانه جامد مرکب بر پایه آمیزه HTPB/PEG و نرم‌کننده بوتیل‌ننا
A way to increase the specific impulse of solid propellants is using the energetic components as energetic binder or energetic plasticizer in the propellant formulations. Hydroxy terminated poly butadiene (HTPB) is the one of pre-polymer which was specifically synthesized for its use as a propellant. Incorporating of PEG into HTPB chains lead to increasing the polarity of binder and maybe preve...
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