Effect of Water and Humidity on Hypergolic Propellant Ignition Delay



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AIAA-2015-3867 Effect of Water and Humidity on Hypergolic Propellant Ignition Delay
IV. Results and Trends
A. Aging Results
The TEAB samples removed after 2 and 4 days in the humidity oven looked much more opaque than when they started, but they were still liquid. The sample pulled on the 6
th day had the consistency of a gel, but was still partially liquid. The samples on the 7
th day were divided two were similar to the sample on day 6, but two were white, dry, and chalky. Additionally, the samples pulled on days 6 and 7 visibly lost mass. Ramachandran’s TEAB was put in the same oven with the same conditions and it also turned into a white, chalky powder after 7 days. The sample aged for 7 days in dry air was slightly more opaque than it started. The sample in a dry nitrogen environment for 14 days was not anymore opaque than it started. Neither of these two samples lost significant mass. All of the samples after aging was completed are shown in Figure 4.
Figure 4. Aged TEAB samples. Top row is the Sigma-Aldrich samples pulled after 2 days (a, 4 days (b, 6 days (c, and
7 days (din the humidity oven. Bottom row is the TEAB synthesized by Ramachandran after 7 days in the humidity oven
(e), the sample in dry air for 7 days (f, and in dry nitrogen for 14 days (g. The four vials ind) are due to the early

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