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DubaiAmateurRocketry
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About the the butylen R being lost was a drawing error, instead of trying to draw the entire structure I used a picture from an article.
Quote: Originally posted by Laboratory of Liptakov  | After reading this thread it seems, respectively I estimate, that will the miracle, if we sometime see only one gram the modern active binder -
plasticizer. From preparations in amateur conditions........ ...Dr.
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Yeah, I'd definitely want synthesize some, however not anytime soon - until I can test it with other oxidizers. Which will be few years as college has
been pretty busy.
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MineMan
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All a few questions. How do you cure these energetic binders...? I would like to make cast propellant but the only way I can think of is acetone and
Nitro cotton... but I don’t I could get the acetone to evaporate...
I am assuming cures are always used for rocketry and PBX?
Has anyone tried these energetic binders? How do you cure them??
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Simoski
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I watched a Laboratory of Liptakov YouTube video where he immerses a roll of insulation tape into petroleum for a few days, then removing the tape he
has the sticky stuff dissolved in the petroleum .
He goes on to plasticize various energetics with it.
The sticky stuff is Pib, Polyisobutylene.
I do not know if this will help but I would take the fuel and oxidiser, mix it together with the petroleum/Pib and let the petroleum evaporate away.
Should leave a plasticized grain.
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Herr Haber
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Are you suggesting you would use an unknown quantity of PIB ? 
I'm kidding but that's a good reason. If it's not reproducible...
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Laboratory of Liptakov
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MineMan meant an energetically active binder. Such as nitrocellulose, or something else - nitro - that is itself active without further, major
propellant. That's why I didn't suggest PIB or anything else that isn't an active binder. Of course that exist active binder, this is diethylenglycol
dinitrate (DEGDN) mixed with nitrocellulose. Arises solid rocket fuel: https://en.wikipedia.org/wiki/Diethylene_glycol_dinitrate
However, modern best propellant are ammonium perchlorate + alu powder as main fuel + epoxy as super solid binder as secondary fuel in one.
Development of primarily - secondary substances CHP (2015) Lithex (2022) Brightelite (2023) Nitrocelite (2024)
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MineMan
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LL. Yes. Energetic bind is much better than epoxy... for explosives at least. As it allows metal powders to react quickly.
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Microtek
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For rocket propellant grains (AN/Al based), I have used an NG/NC binder system as follows:
- Powdered NC was mixed with NG in a 50:50 ratio by dissolving NG in enough ethanol to wet the powdered NC
- Then the other components were mixed in and the ethanol was allowed to evaporate
- Finally, the propellant was pressed into the mold with a dwell time of about 5-10 minutes. This allows the NC/NG granules to flow into each other
and form a rubbery matrix (much like a sintering process)
It only works well at relatively high NG/NC ratios, and does require pressing.
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MineMan
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You made a propellant with AN/Al!? Tell us more!!
For a big rocket this would be a lot of nitroglycerine, which I don’t feel safe with... I take it nitromethane or something safer could not be used
because of the evaporation.
Or is nitroglycerine really not dangerous... only handled it once... use to handling solids.
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XeonTheMGPony
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| Quote: Originally posted by MineMan | You made a propellant with AN/Al!? Tell us more!!
For a big rocket this would be a lot of nitroglycerine, which I don’t feel safe with... I take it nitromethane or something safer could not be used
because of the evaporation.
Or is nitroglycerine really not dangerous... only handled it once... use to handling solids. |
Well cleaned samples are as safe as any other energetic, I have had a pure 1cc sample now in a syringe for over a couple years and I test it every so
oft.
I am speaking of small scale batch sizes, and good handling protocols, once it is made, and cleaned dissolve it in the solvent of choice.
Have a clean bench with only the things needed for the job and line with paper mat to absorb any drips.
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Nitrosio
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http://pyrobin.com/files/Polymere%20Sprengstoffe.pdf
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