اثر مقدار دی‌مریل دی‌ایزوسیانات بر رفتاررئولوژیکی و خواص مکانیکی یک پیشرانه جامد مرکب بر پایه HTPB

مطالعه پارامترهای موثر بر خواص مکانیکی پیشرانه جامد مرکب بر پایه HTPB/Al/AP

The success of the composite solid propellant motor depends on the proper stress-strain behavior of the propellant grain against tensile, compression and shear stresses and intensive changes in gravity during launch. In this paper, the effect of formulation components and other parameters affecting mechanical properties (tensile strength, elongation and elastic modulus), and their effects AP/Al...

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...

مروری بر روش های بهبود خواص مکانیکی پیشرانه های جامد مرکب بر پایه GAP (علمی-ترویجی)

GAP propellants has good performance due to high energy of this polymer. Unfortunately, due to poor flexibility of GAP polymer and presence of rigid and conjugated azide side groups in its structure, they have poor mechanical properties especially under low temperatures. This article deals with methods of improving mechanical properties of solid composite propellants based on GAP through changi...

بررسی کهولت سوخت جامد مرکب بر پایه HTPB با روش آنالیز خواص مکانیکی دینامیکی (علمی-پژوهشی)

تأثیر جایگزینی بخشی ازAP با RDX برخواص مکانیکی، ایمنی و عملکردی پیشرانه های جامد مرکب بر پایه HTPB(علمی-ترویجی)

The partial replacement of RDX with AP attention of many researchers. In this paper, Firstly reasons of replacing part of AP with RDX expressed and the influence of replacing part of AP with RDX on the mechanical, safety and ballistic properties of composite solid propellant have been studied. Using of nitramines in the propellant formulations cause to change in the mechanical properties such ...

مقایسه خواص پیشرانه‌های جامد مرکب بر پایه HTPB و NHTPB/HTPB

Hydroxyl terminated polybutadiene (HTPB) is the most commonly used binder in composite solid propellants. However, due to its non-energetic character, in practice it is just a dead weight; Therefore, replacing HTPB with an energetic polymer is essential. In this research, nitrated hydroxyl terminated polybutadiene resin (NHTPB) with 12.2% nitration rate, in combination with HTPB resin was used ...