In this study, when the propellant containing dioctyl adipate (DOA) adhered to the liner containing various plasticizers and was cured, the change in the properties of the propellant was confirmed. In the process, it was confirmed through an experiment that the properties of the propellant and liner were significantly changed by the diffusion effect of DOA, a plasticizer in the propellant. The adhesion between the propellant and the liner containing the isodecylpelargonate (IDP) plasticizer was decreased by an average of 53.2% compared to the adhesion between the liner and the propellant containing DOA or dioctylsebacate (DOS) which has a similar chemical structure to DOA. In addition, the physical properties of the propellant to which the liner containing IDP plasticizer was applied were 15.6% and 4.5% higher on average in modulus and tensile strength, respectively, and the elongation performance was lower by 3.9% on average, compared to the propellant without IDP plasticizer.

본 연구에서는 dioctyl adipate(DOA)를 함유한 추진제가 다양한 가소제를 함유한 라이너와 접착하여 경화되었을 때 물성 변화를 관찰하였다. 추진제 내의 가소제인 DOA의 확산 효과에 의하여 추진제, 라이너 특성이 크게 변화하는 것을 실험을 통해 확인하였다. Isodecylpelargonate(IDP) 가소제를 함유한 라이너와 추진제의 접착력은 DOA 혹은 DOA와 화학구조가 비슷한 dioctylsebacate(DOS)를 함유한 라이너와 추진제 사이의 접착력에 비해 평균 53.2% 떨어졌다. 또한 IDP 가소제를 함유한 라이너가 적용된 추진제의 물성은 그렇지 않은 추진제에 비하여 영률값, 인장 하중 값이 각각 평균 15.6%, 4.5% 크고 연신율 성능은 평균 3.9% 떨어졌다.

Keywords: propellant, liner, plasticizer, adhesion, physical properties.