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Investigation into reversion of polyurethane encapsulants
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lynch, C. R. |
| Copyright Year | 1973 |
| Description | The effect of high humidity (95% RH) at 60 C, 70 C, 85 C and 100 C on the solid-to-liquid reversion of polyurethane elastomers (used for potting electrical connectors and conformal coating printed circuit boards) was investigated. Hardness measurements were conducted on eleven elastomers to track reversion for a 101-day period. The primary purpose of the tests was to provide data to predict service life for the polyurethane elastomers. This was not accomplished as the hardness did not deteriorate rapidly enough at the lower test temperatures. The tests did determine that the potting and coating materials most widely used on the S-1C Program are susceptible to reversion but appear adequate for service in the S-1C environment. |
| File Size | 622610 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740010698 |
| Archival Resource Key | ark:/13960/t74v1ch7m |
| Language | English |
| Publisher Date | 1973-03-08 |
| Access Restriction | Open |
| Subject Keyword | Chemistry Polyurethane Resins Phase Transformations Humidity Elastomers Environmental Tests Electric Connectors Potting Compounds Saturn S-1c Stage Protective Coatings Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
