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Elastomer: Fluorosilicone Rubber (FVMQ), Fuel and Oil Resistant, High Strength, 45 – 55 Shore A Hardness, For Products in Fuel Systems / Lubricating Oils
Elastomer: Chloroprene Rubber (CR) Weather Resistant 35 - 45
Packaging and Identification of Molded Elastomeric Seals and Sealing Components
Sponge, Chloroprene (CR) Rubber, Soft
Elastomer: Nitrile Rubber (NBR) Synthetic Oil Resistant Sheets, 65 to 75 Type A Hardness for Products in Engine Oil Systems
Rubber, Ethylene-Propylene, Hydrazine Resistant
Elastomer: Rubber, Silicone (VMQ) Non-Oil-Resistant Low Compression Set 65 - 75 Shore A Hardness
Designing with Elastomers for use at Low Temperatures, Near or Below Glass Transition
To ensure success in design of elastomeric parts for use at low temperature, the design engineer must understand the peculiar properties of rubber materials at these temperatures.
There are no static applications of rubber. The Gaussian theory of rubber elasticity demonstrates that the elastic characteristic of rubber is due to approximately 15% internal energy and the balance, 85%, is entropy change. In other words, when an elastomer is deformed, the elastomer chain network is forced to rearrange its configuration thereby storing energy through entropy change. Thermodynamically, this means that rubber elasticity is time and temperature dependent (Reference 25).
The purpose of this report is to provide guidance on low temperature properties of rubber with the terminology, test methods, and mathematical models applicable to rubber, and to present some practical experience.