Adhesion properties and thermal degradation of silicone rubber

Abstract

Silicone rubber is suitable for the thermal insulator of the rocket motors owing to its heat resisting properties as well as its excellent elasticity and restoring force. However, the adhesion properties of the silicone rubber should be improved greatly to be used as the thermal insulator because of its poor adhesiveness coming from the low surface tension. Functional groups were incorporated through copolymerization to the silicone rubber to induce chemical reaction with the functional groups in the propellant/liner components to enhance the adhesion properties. Peeling tests results disclosed that the incorporation of amine groups was the most efficient for the adhesiveness enhancement and that addition of carbon black improved the adhesiveness still more. Stability against thermal degradation of the silicone rubber was examined by measuring the activation energy through the thermogravimetric analysis. The results revealed that the compounding of the Cloisite 1 clays boosted up the thermal stability of the silicone rubber much more greatly than that of carbon black.

Organic Nano-Montmorillonite for Simultaneously Improving the Flame Retardancy, Thermal Stability, and Mechanical Properties of Intumescent Flame-Retardant Silicone Rubber Composites

“…[1][2][3][4][5][6] However, the molecular chains of the RTVSR contain large amounts of combustible C and H atoms, which endow it with flammable characteristics. [7] Consequently, although it has the properties of high-temperature-resistance and excellent thermal stability, it can be ignited at low enough temperatures that they restrict its applications in some fields, specifically including aerospace, electrical and electronic appliances, sealing products, etc.…”

Flame retardancy and smoke suppression of silicone foams with microcapsulated aluminum hypophosphite and zinc borate

“…As a high‐performance type of material, SiFs exhibit many outstanding characteristics, including good biological compatibility, nontoxicity, antiaging, strong sound absorption, chemical stability, light weight, ozone resistance, high‐ and low‐temperature resistance, and electrical insulation . Therefore, they are widely applied in aerospace, national defense, medicine, electrical, transportation, and construction industries . However, as the abundant hydrocarbon groups on its side chain, SiFs can smolder, combust, and release choking smoke once ignited, which become a bottleneck restricting their rapid popularization and application.…”

“…[2][3][4][5][6] Therefore, they are widely applied in aerospace, national defense, medicine, electrical, transportation, and construction industries. [7][8][9][10][11][12] However, as the abundant hydrocarbon groups on its side chain, SiFs can smolder, combust, and release choking smoke once ignited, which become a bottleneck restricting their rapid popularization and application. Therefore, the flame retardation properties of SiFs warrant study.…”

Microfluidic fabrication of polysiloxane/dimethyl methylphosphonate flame‐retardant microcapsule and its application in silicone foams

“…As one of the high‐performance materials, flexible silicone foams (SiFs) are widely used in aerospace, defense, medicine, transportation, electrical, and construction industry, and etc . However, SiFs still have a tendency to combust and release choking smoke, which results in a bottleneck and restricts their rapid popularization and application.…”