dave321
Harmless
Posts: 45
Registered: 22-11-2012
Member Is Offline
Mood: No Mood
|
|
potential new binder ?
this looks interesting, sugru, a moldable silicone that cures to form a flexible whatever.....
...hmmm
wonder how much solids you could get in it
see bottom of page for msds....it contains talc and barium sulphate as fillers
http://sugru.com/about
sugru is a formulation of Formerol - the patented formable silicone technology invented by Jane. It's Formerol F.10, to be precise. We call it sugru,
because that's its superhero name.
sugru has a Shore A hardness of 70, Density of 1.3g/cm3, Tensile Strength of 1.89 Mpa, Youngs Modulus of 5.59MPa, an Strain to Failure of 211%, DIN
Abrasion Resistance of 24% ARI index (Standard used ISO4649 Method A), Electrical Resistivity - Surface 1.40 x 10^14 Ohms (Standard used BS903),
Electrical Resistivity - Volume 2.55 x 10^14 Ohms (Standard used BS903), and a Williams Plasticity of 160mm.
[Edited on 22-8-2013 by dave321]
|
|
|
Dany
Hazard to Others
Posts: 482
Registered: 3-8-2013
Member Is Offline
Mood: No Mood
|
|
Yes, interresting new binder, but why it is in the energetic material section?
if you are offering this binder as a binder in energetic material formulation, i think this is not a good idea. Today research try to find new
energetic binder and plasticizers so to enhance detonation properties. Inert binders are almost from the past...
Dany.
|
|
|
dave321
Harmless
Posts: 45
Registered: 22-11-2012
Member Is Offline
Mood: No Mood
|
|
could be used as a pbx ?
or maybe rather Sibx 
that's why its in this section, not all binders have to be energetic or reactive
|
|
|
Dany
Hazard to Others
Posts: 482
Registered: 3-8-2013
Member Is Offline
Mood: No Mood
|
|
As a PBX??
but PBX are rigid solid materials. Most PBX formulation contain 10% binder or less. Your are proposing a binder that become flexible when cured. not
all binder are suitable for explosive PBX formulations. The binder should have excellent mechanical properties and should not crack under severe
loading or with temperature change. Once cracks are introduce, the PBX formulation become sensitive due to the formation of potential site for hot
spot formation. A PBX binder should allow the users to easily press the charge to 99% TMD (Theoretical Maximum Density) so as to reach the maximum
detonation performance. Silicon based polymer were introduced in rubberized explosive formulation like Detasheet (Du pont de Nemour) or XTX-8003 and
XTX-8004.
Dany.
|
|
|
Bert
Super Administrator
Posts: 2821
Registered: 12-3-2004
Member Is Offline
Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
|
|
There has been some use of GE silicone II for binder/fuel in pyrotechnics.
Blue strobe rocket fuel/binder, self propelled stars- Some mixes are listed on page 15 here:
http://www.westernpyro.org/files/newsletters/Volume%2022-1.p...
Clear (no inert fillers) product was used.
Be aware: For high thrust rocket applications a too flexible fuel grain that can slump under high G's, pulling away from bonding to motor case walls
can increase the area of fuel burning and lead to a CATO.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
|
|
|
AndersHoveland
Hazard to Other Members, due to repeated speculation and posting of untested highly dangerous procedures!
Posts: 1986
Registered: 2-3-2011
Member Is Offline
Mood: No Mood
|
|
The addition of a small amount of boric acid can be used to crosslink wetted corn starch, pectin, or guar gum, greatly increasing gelatinization. This
could potentially be used as a plasticizer. If propylene glycol (common food additive) is used as the wetting agent, it is less likely to dry out.
These mixes have are somewhat similar in consistency to silly putty.
In fact, if the starch was partially nitrated, that would probably help overall performance so the binder would not be entirely inert. Partial
nitration would also be likely to improve the physical handling characteristics (think nitrocellulose lacquer paste).
[Edited on 16-9-2013 by AndersHoveland]
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
