Effect of Fuel-Binders Ingredients, and Additives upon the Physico-Mechanical Properties of Polyurethane : Ammonium Perchlorate-Based Propellant Grains
the Institute of Space and Aeronautical Science University of Tokyo
the Institute of Space and Aeronautical Science University of Tokyo
the Institute of Space and Aeronautical Science University of Tokyo
the Institute of Space and Aeronautical Science University of Tokyo
the Institute of Space and Aeronautical Science University of Tokyo
The important propellant grain property associated with the improvement of the combustion instability is the elongation which has a correlation with the fuel-binder network structure. A optimum recipe of equvalence ratio of isocyanate to hydroxyl in starting mixture, R, and fraction of OH from triol, pt, for specifying polyurethane-based propellant formulation was determined and applied to SSR motors using the grains of 100mm in diameter and 550～2,240mm in length. However, it was difficult to obtain sufficient elongation of the grains only with changing these polymer network parameters. The use of some additives was very effective in supressing the combustion instability as the result of the corresponding increase in the grain elongation.
II.3.3. ポリウレタン : 過塩素酸アンモニウム系推進剤グレインの物理的・機械的性質におよぼす燃料結合成分および添加剤の影響(3 推進剤)(II.関連研究)
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