组分对高能HTPB推进剂燃烧性能和力学性能的影响

Effect of Components on Combustion and Mechanical Properties of HTPB Propellant with High Energy

通过调整氧化剂AP粒径与含量、键合剂及R值，研究了固体质量分数为90％的HTPB推进剂的燃烧性能和力学性能。结果表明，在HTPB推进剂能量性能得到提高的同时，推进剂的燃烧性能和力学性能也得到了较好的保证。高固体含量下HTPB推进剂的燃烧和力学性能随配方调节呈现出较为明显的规律。推进剂的燃烧性能稳定，燃速和压力指数可调，压力指数控制在0．30～0．40；分别测定了高温（60℃）、常温（20℃）和低温（-40℃）力学性能，高温、低温和常温下的拉伸强度一般均大于1．0MPa，低温延伸率最高可达74．7％。

The combustion properties and mechanical properties of HTPB propellant with 90% solid mass fraction were studied by changing the content and particle size of oxidizer AP, bonding agent and the value of R. The results show that the energy of HTPB propellant increases with the increase of the solid content, and the combustion properties and mechanical properties also keep in a good state. Under the condition of high solid mass fraction, the combustion and mechanical properties of HTPB propellant display some distinct rules as the change of the directions for producing chemicals. The propellants combust steadily and the burning rate and pressure exponent can be controlled. Its burning rate-pressure exponent is between 0. 30 and 0. 40. The mechanical properties are tested at three different temperatures： 60℃, 25℃ and --40℃ ,revealing that the maximum tensile strength of the propellant at the three temperatures is larger than 1.0MPa and the maximum elongation of HTPB propellant at --40℃ can reach 74. 7%.