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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
Sponge, Silicone Rubber Closed Cell, Firm
Acrylonitrile Butadiene (NBR) Rubber Aromatic Fuel Resistant 75 - 85
Rubber: Ethylene Propylene (EP) Phosphate Ester Resistant Low Temperature Tg -67 °F (-55 °C), 75 to 85 Type M Hardness for Seals in Hydraulic Systems
Rubber: Acrylonitrile-Butadiene (NBR) Fuel-Resistant 60 - 70 Type A Hardness
Manufacturing Processing Requirements for Molded Elastomer Components Used in Aerospace Applications
Elastomer: Chloroprene Rubber (CR) Weather Resistant 55 - 65
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
Test Slabs, Chloroprene (CR) 70 - 80
Sponge, Fluorosilicone (FVM) Rubber Closed Cell
Rubber: Silicone [VMQ] Non-Oil Resistant Low Compression Set, 65 - 75 Type A Hardness
Rubber, Ethylene-Propylene, Hydrazine Resistant
Required O-ring Sizes for Quality Conformance Testing
Rubber: Vinyl-Methyl Silicone (VMQ) Hot Air Resistant Low Compression Set, 70 to 80 Type A Hardness for Seals in Hot Air Systems
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.