Abstract
High-temperature polymers are widely used in aerospace applications. Polymeric ablatives as thermal protection systems (TPS) materials are sacrificial materials used as a heat shield under extreme heating conditions, as space reentry and hypersonic flights. This chapter is divided into two parts. The first part intends to provide an overview of several commonly used high-temperature polymers possessing high thermal stability and working temperatures in the context of heat shielding applications. The polymers are divided into thermosets and thermoplastics. In the second part of this chapter, the basics of high-temperature testing of high-temperature polymers are reviewed. For characterization, oxy-acetylene test bed (OTB), simulated solid rocket motor (SSRM), subscale char motor, Laser Hardened Materials Evaluation Laboratory (LHMEL), inductively coupled plasma (ICP) torch, and arc jet test facilities will be discussed for their use in aerothermal ablation testing of ablative materials.
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