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AGE CONTROL OF AGE SENSITIVE ELASTOMERIC MATERIALS

1975-05-01
HISTORICAL
AIR1364
This report summarizes data and background relative to age control of specific classes of those nitrile type synthetic elastomers used in sealing devices which are resistant to petroleum base hydraulic fluids, lubricating oils and aircraft fuels. This includes, but is not limited to, those nitrile (NBR or BUNA-N) elastomers specifically covered by Section I of MIL-STD-1523.
Standard

Color Identification for O-ring Seals

2003-12-30
HISTORICAL
ARP1832
This Aerospace Recommended Practice sets forth the guidelines for the use of non-black O-ring seals. Black is the preferred color for polymer types other than Silicone and Fluorosilicone. When a color other than black is to be used, those established by this document are the preferred.
Standard

Color Identification for O-ring Seals

2011-09-20
CURRENT
ARP1832A
This Aerospace Recommended Practice sets forth the guidelines for the use of non-black O-ring seals. Black is the preferred color for polymer types other than Silicone and Fluorosilicone. When a color other than black is to be used, those established by this document are the preferred.
Standard

DESIGNING FOR LONG LIFE WITH ELASTOMERS

1991-04-01
HISTORICAL
AIR1412A
This document lists those guidelines recognized as being essential for consideration by the designer who is preparing to select an elastomer as part of an aerospace design.
Standard

Designing for Long Life with Elastomers

2023-07-11
CURRENT
AIR1412E
This document lists those guidelines recognized as being essential for consideration by the designer who is preparing to select an elastomer as part of an aerospace design.
Standard

Designing for Long Life with Elastomers

2018-01-04
HISTORICAL
AIR1412D
This document lists those guidelines recognized as being essential for consideration by the designer who is preparing to select an elastomer as part of an aerospace design.
Standard

Designing with Elastomers for Use at Low Temperatures, Near or Below Glass Transition

2003-12-30
HISTORICAL
AIR1387C
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.
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