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kratomiter
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Thank you for the paper, it will be interesting to find a route to aminoguanidine from cyanoguanidine, avoiding hydrazoic acid at all cost.
@Cryolite. Take a look to guanazole derivatives like HDNT and its salts.
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greenlight
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I was just trying to figure out something and maybe someone could shed some light on it.
Out of PETN plastic explosive and ETN plastic explosive, which would be more suitable for shaped charges and would afford the most power?
PETN has a higher VOD by 300m/s than ETN but needs a higher density of 1.70 compared to ETN's 1.60 to acheive it's maximum velocity. So ETN will
catch up a little with a PE of the same density comprising PETN?
Secondly PETN has a negative oxygen balance while ETN has a positive OB. ETN has oxygen left over to burn up the binder and plasticizer inerts thus a
higher VOD again?
I might be missing something here, but does PETN still win in the performance department when talking about plastic-bonded explosives or do these
factor make ETN level up?
Be good, otherwise be good at it 
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MineMan
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I don't like how touchy ETN is... I would go with PETN.
Also, new research shows that thier VOD is the same... 8400m/s
Higher density is always better because Det pressure depends on it.
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Dornier 335A
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Greenlight, ETN and PETN have pretty much the same detonation velocity at a given density. PETN has a higher density of 1.77 g/cc compared to 1.72
g/cm3 for ETN which results in some 200 m/s higher maximum detonation velocity.
The extra oxygen in ETN is used to burn the binders to release some additional energy. I don't know when it is burned though - if it is in
the primary reaction zone just behind the shock wave (unlikely), it will increase detonation velocity somewhat. Otherwise it will not affect shaped
charge performance.
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greenlight
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Thanks for the input mineman and dornier.
So it seems that they are quite even but PETN takes the lead in the sensitivity area.
You are most likely right, the combustion of the binder/plasticizer would probably be a secondary reaction and wouldn't make much difference to the
performance of the charge.
Be good, otherwise be good at it
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ecos
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so the excess oxygen in ETN was not useful at all ?
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MineMan
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well,
In this report they showed that if the Al is sized right it does react in time to help with brisance and gurny velocity. So yes it can be useful.
The fact the Al hurts the VOD is also (kind of) a myth is the particles are sized correctly.
and.. http://www.dtic.mil/ndia/2012IMEM/13890anderson10B.pdf
Attachment: Combined Effects.pdf (1.8MB)
This file has been downloaded 734 times
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Dornier 335A
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Not brisance. Aluminium does not react at the CJ-point and therefore won't increase detonation velocity or pressure. Fine aluminium can however react
quickly enough afterwards to increase Gurney velocity and cylinder expansion performance. This won't help in shaped charges though.
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PHILOU Zrealone
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It may be if the binder is active (detonating explosive material also) and if mixed at a molecular level.
If molten ETN dissolves PETN, then you may get an intermediary mix with better output energy and detonic parameters than both explosives appart.
If molten ETN dissolves nitrocellulose like NG or EGDN does; then the resulting hard wax will be hell of a blasting wax (hard gel).
PH Z (PHILOU Zrealone)
"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
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MineMan
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Melting it with wax, could that come pretty close to a molecular mixture?
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PHILOU Zrealone
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If during the melting one becomes a solvent for the other compound...than YES!
But wax is by nature CxHy (and sometimes with a few Oz) so a fuel of low density... It is normaly 100% apolar and hydrophobic...
ETN is hydrophobic but slightly polar... wax would decrease its density but benefit a little for the output energy since opposits OB may compensate.
PETN is hydrophobic and apolar but also with a <0 OB so adding wax will make it worst and reduce its density aswel.
I was speaking of mixing PETN or NC (<0 OB) and ETN (>0 OB).
In all aspects PETN and NC are better than wax.
Maybe I was misunderstood by refering to "wax" for the consistency and low melting point of the ETN mixed HE --> waxy.
[Edited on 19-10-2016 by PHILOU Zrealone]
PH Z (PHILOU Zrealone)
"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
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JefLeb
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Homemade blasting cap for Ammonal
Hello everyone.
I've been looking for the answers to my questions in the forum and I found some useful informations, even in this same thread, but I'm still not sure
about something:
I would like to ask you whether or not a blasting cap made of 750mg Silver Acetylide Double Salts and 1g ETN would be sufficient to properly
initialize 1kg Ammonal charge (95% AN and 5% Al).
The primary and secondary charges of the cap are the same as the one in the following video, but the amounts and ratio between them are different.
https://www.youtube.com/watch?v=zkfiKlYDxno
Thank you and have a nice day.
Jeffrey
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Lotilko
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I believe it should work, SASD has good initiating properties and ETN is a decent booster, so yes.
As always, one can add a little sensitizer like NM, but if you don't have it, it's fine.
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XeonTheMGPony
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Aluminium IS the sensitize, Nm would just be more of a density modifier in this case.
As I said in PM, there is allot more to consider then just the cap, as grain size, loading density, diameter all effect what is needed for a good
strong reliable det and whether you will need a booster or not.
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Tin man
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I would recommend using a much smaller amount of SA.DS. 50 mg SA.DS pressed On top of 100 mg of recrystallized ETN in a coffee stirrer straw should
create a reliable det. this is placed in a plastic tube of the diameter 5 millimeters. 1 gram of ETN is pressed with light pressure into the tube.
The end should be sealed with electrical tape, or any adhesive that is compatible with ETN.
Hope This helps!
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MineMan
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750mg of SADS... way too much, listen to Tin Man. Also make your SADS properly and make sure it does not come into contact with sunlight.
Somewhere in this forum I posted an NPED with just ETN that works quite well.
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Bert
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Threads Merged
21-10-2016 at 22:28 |
CD4060
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perchlorate cheddite
Is it possible to make a binary explosive (low brisance) of K-perchlorate and an organic reductor? I know that generally ternary compounds are used w/
aromatic nitro compounds and with chlorate instead of perchlorate but I only have hold of K-perchlorate (a lot) as inorganic oxidizer.
I have already SA/DS -> PETN as initiator (raw materials excess).
I have tried to find information on the forum using TFSE but could not find any clarity... I am afraid KClO4 is too stable...
[Edited on 23-10-2016 by CD4060]
[Edited on 23-10-2016 by CD4060]
[Edited on 23-10-2016 by CD4060]
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MineMan
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Can you get sodium perchlorate, that will work... don't know about K perchlorate.
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CD4060
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Unfortunately not because it's from pyrotechnic supplier where only potassium is used.
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MineMan
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hmm, guess you will just have to give it a go and let us know!
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MineMan
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Binary Liquid Deflagration or Detonation
Hello all,
I have been experimenting with flash powder quite a bit and had a few ideas or questions.
Are there any stable binary liquid mixes that deflagerate (or preferably detonate) at the same speed or faster as flash powder when ignited by a fuse?
If both components are liquid than a very intimate mix would evolve, probably forcing the mix to detonation I am guessing (like Dorniers Nano Flash).
I guess the key word is stable, I think H2O2 mixtures can do this, but can they be handled predictably and safely? Do you think NM could be mixed with
another material to undergo DDT from a fuse?
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JefLeb
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Thank you for all the replies.
Tin man, I'm sorry, I didn't understand how the coffee straw and the plastic tube are arranged to make the detonator.
I tried making a little drawing, is this the layout you had in mind?
The coffee straw is in red whereas the plastic tube is blue.
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Fulmen
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No such deflagration is possible, that would require a detonation.
A powered pyrotechnic mixture has airspace that allow the combustion to propagate through the powder, if pressed to a solid pellet the burn rate will
be in the order of mm's to cm's per second. A liquid lacks the air space unless you turn it into an aerosol or a foam.
We're not banging rocks together here. We know how to put a man back together.
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Tin man
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Yes, sorta. In my mind the blue tube would be longer than the red one. The coffee straw might be 1.5 centimeters, and the blue tube would be 4
centimeters. But it doesn't have to be exact.
Feel free to PM me questions as well.
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nitro-genes
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NM with hydrazine may form some hydrazinium nitromethanate, methazonate or reaction products thereof, which reportedly are very reactive/explosive. If
they are soluble enough in the NM a fuse sensitive mix might result (unlikely though) Couldn't find much about the products formed of mixing NM and
hydrazine, which may be interesting in itself. Organo metallic compounds might also produce sensitive liquid mixtures with oxidizer, though since many
are pyroforic/hypergolic very impractical probably.
[Edited on 24-10-2016 by nitro-genes]
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