It's 1.1D and it's an energetic PITA. The intermediate decomposition step is
N2O and H4N2O3. It's unstable and even more if it's completely dry making
it's use with standard urethane chemistries a challenge. There are some work
arounds though. One is an alternative curing scheme used with glycidyl azide
polymer that produces a rather energetic propellant with "strike anywhere"
properties and a Br of around 2"/sec. Battero and company at SRI claimed to
have first synthesized it but they didn't. The Russians did and actually
flew some examples while blowing up a couple of plants in the process. How
the U.S first caught wind of it is actually quite interesting and has to do
with its signature or lack of one at the time. China Lake did a lot of work
on it and built a pearling tower to produce it. I tested its compatibility
with 90% HTP and it pulled a rapid and disappearing act in the process. At
the time we had better luck with HNF, burn rate exponent notwithstanding.
The numbers and citations for it are attached if you want to play with it on
paper. You're probably better off limiting yourself to that exercise. ATK
and China Lake are the only two domestic sources that I'm aware of. The
material we worked with came from Bofors or Nammo via the DND IIRC.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> On Behalf
Of snyder@xxxxxxxxxx
Sent: Tuesday, July 9, 2019 10:50 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] ADN Q?
To the appreciated Wisdom holders on the list,
Well, Since there has been so much talk about solids lately, Of which I know
very little, I would like to ask about ADN.
(Ammonium DiNitramide)
Now it seems that mixing it with methanol/et,al. and calling it a green
liquid mono-propellant is popular, but it is a solid first.
(A solid more prone to detonation than AP, but compared to AN ?)
It seems to be an oxidizer similar to AN or AP, but with slightly higher
performance, depending on propellant formulation.
(ISP performance, maybe not density-Isp ?)
I'm sure in small quantities, it is pricey.
My main question is: What is it like to work with and why is it not used
more often ?
Thanks guys,
-Gar.
Attachment:
ADN.pdf
Description: Adobe PDF document
