Prince Rupert's Drop EXPLODING in Epoxy Resin at 456,522 fps - Smarter Every Day 273 

:)

:(

Can we just appreciate for a moment how Amazing his videos are

could you make a rupert sphere. and how about encasing the tail in something very vibration absorbing, thus making it much tougher. Maybe a substance very particular like non newtonian liquids. Something that really soaks up vibration energy because that's what kills otherwise very strong glass.

I just finished the video, and I was thinking how cool it would look if you use the schlieren method in the slo-motion footage? does the breaking of a drop cause shockwaves in the air?

Hello Master of slow mo

Oh hi B 👋

*_CEDDERS!_*

Love you guys!

It would be really cool if y’all collaborated on something like this with the super slow mo cam at like 1,000,000 fps

They could also try submerging the epoxy box in an ice water bath while it sets to slow the reaction even more!

@@thomaswalters7117 cooling the outside of the box will increase the temperature differential and thus the cure time between the middle of the box and the outside. Epoxy cures from the inside out.

the whole time im just thinking, if they want a jelly like consistency, why not use clear jello?

@@maggswastaken Yup, balistics gel and use a dark coloured glass for contrast

@@maggswastaken jell-o would just explode. Ballistics gel is a better option.

Same

Same

Same

i think they wanted to analyze the waves that a very thick substance formed around the explosion

Me, too. That would've been really cool to see.

Very cool. Speaking as a random viewer, please, keep us posted.

When you end the editing of this video please write here a response. I really want to see it!

Where can I find the footage?

I’m sorry to comment so much but brake the tail while the whole thing is in a vacuum chamber.

Following

Yeah I thought ballistics gel would work way better, not sure why they didn't try different mediums.

Or that soft plastic used to make fishing baits

Same thoughts in letting it fully harden. Would also like to see everything but 1” of the head submerged then let it harden and shoot it and or bang with hammer. If the shock wave can’t move the tail perhaps we can see how hard it really is.

Having played with epoxy resin quite a bit once it's fully cured the PRD wouldn't have enough force to break the block.

@@bbrandonh ballistics gel would be super interesting i think! It would allow for more kinetic energy to be displaced so you might get a better look at the patterns the drop creates

The resin people have arrived!

I was about to comment that this is the collab we need

I was wondering how long it'd take you two to get here. =P

I would love to see a collab with y'all.

literally about to write, "Just call E&K to solve all your resin problems"

No I thought that’s what it would be to begin with

Yeah I'm wondering why he didn't.

me too but then the solid resin would hold the blast area instead of contain it.

@@rizkyrakhmat1 isn't holding and containing basically the same thinf

@@chrissimpson453 pardon my inexcellence of potraying my means by lack of knowledge in proper english language. What I meant by contain is the structure of liquid resin shows better simulation when impact happened while hold is literally hold the impact like a solid cement would. Im still not sure if that explainmy previous statement better or just add more confusion 🤷😄

This should be upvoted higher

He wanted something for his desk most of all.

Sounds interesting 🤔

I'm open to brand suggestions!

I’m not sure on brands, but people use resins for art, and they are clear too. There is one called “ArtResin”, go figure.

Art Cast should have a slow cure resin. I know Nick Zammeti uses Entropy Resins for deep pours. Also check a couple of Ben's Worx videos as he does big resin pours too. I THINK he uses Art Cast but I'm second guessing my memory at the moment.

You can also check out Shop Time with Peter Brown, he does some pretty large reain pours too. He uses Total Boat for his pours.

@@smartereveryday ARe you going to try this again with a different resin? I hope so. It was really cool, and it would be even more cool to see it even clearer! Thanks for all the great content! *PS. You could try checking Ben's Worx videos as mentioned above, he gets some really clear eggs and stuff!^^

then watch the videos with the hydraulic press

my thoughts on the issues here compared to the desired outcome

how do you set the "springback"? i know how to cast but setting is a bit difficult

@@chadwilson7754 It's like pouring urethane. By carefully controlling the ratio between casting solution and hardener, you can arbitrarily set a final shore harness. It's how they can make skate/longboard wheels so consistent. Only difference is ballistic gel is on the softer side of the shore scale, and it's usually engineered to be as transparent as possible to allow for better viewing of bullet paths.

I was going to say exactly the same thing.

I also wondered about this

I think it would disintegrate the first inch of jelly around the PRD.

Yes, or maybe something similar that can harden afterwards. Maybe with UV light etc.

I was thinking ballistics gel would be good too because it'll be more consistent

plastisol

@@truefiasco2637 what if the vice grips were also embedded halfway in the ballistic gel?

So a reverse ooblick

That sounds promising. The pressure of the resin was collapsing the drop back in on itself. That might solve the problem.

Does the reverse exist as a sort of shock-sensitive epoxy? Something that will be a slow-cure resin under normal conditions, but give it a good shockwave and it solidifies immediately and with enough recovery time/hysteresis to hold the fragments in place until the resin can fully cure?

Don’t know Bingham Plastic, but it sounds like the fluid you’re describing is thixotropic.

@@MendTheWorld Thixotropic is a related term where the viscosity is time-dependent after a force is applied. These is some overlap with these fluid categories. Common Bingham plastic fluids are mayonnaise and toothpaste. I'm not sure of a Bingham plastic fluid that would be suitable for this experiment. Maybe a certain kind of molten polymer?

Why do people post trash like this?

It's not that complex a statement. Might be more fragments on one side because the resin might be more viscous on one side.

@@xx_redwood_xx9737 yes

@@digitalcitizen4533 yes

@@xx_redwood_xx9737 yes

That was one of the things I always loved about Mythbusters. Failure is always an option. And in science we often learn more from failure than we end up learning from success. I've even seen experiments where the eventual success was only understood because of the previous failures. Science is at least as much the journey as it is the destination.

You could have just typed, "amount of attempts" or "number of attempts" "The first N attempts" triggers my PTSD from the math class lol

The other side of this coin is the channels that only show successes make kids think being a successful RU-vidr is easy and they can make that their career without effort. They seem to believe that a 5 minute video takes maybe 10 minutes to produce, and they will never have to really work again.

"This is the way."

Well said!

This... I made a similar comment. I hope he sees these comments. It hurt me watching this, knowing what was going to happen due to the cheap epoxy and poor mixing technique. lol

woo buddy that mixing technique. or lack of mixing. making me cringe.

Bruh tf are u guys doing that you're buying "resins"

@@lucian5389 Idk if you're being cheeky, but the word "epoxy" refers to the solid end product, which is made from mixing polyepoxide resin with a reactive prepolymer resin. Tldr: "Resin" is the appropriate word for uncured liquid "epoxy".

@@milkandcookyz Yeah, I immediately knew this wasn't going to work like he was hoping the moment I saw what he was using to mix the resin haha. The single most important thing to know about doing epoxy is that the resin has to be mixed INCREDIBLY well to cure homogeneously, if at all. Learned that the hard way years ago haha.

"affirmative grunts"

RedKB jumpscare

and also EXPLOSIVE!

Yep

Prince Rupert's DRIP

No

@@idonthaveaname42 Incorrect, yes, but it's extremely difficult.

You would need to make a drop large enough to separate into two large drops so that there was a thin shared tail between them. Maybe if you dropped molten glass off a high drive into a swimming pool, there would be enough time for the drops to separate into conjoined blobs.

Maybe if you dropped a blob of hot glass onto a wire above the water to split it into two drops with one tail

@@CoolAsFreya good idea. But I think a nail-like protrusion would be better, so that only the thick head splits, and the thin tail stays. It would require precise control where to drop the glass. I hope Destin/someone tries to make one!

I was just going to say Ballistic gel, but it's not super stable afterwards...depending how long they want to keep it. If Taofledermaus gets the Bait Gel stuff to be clear instead of yellow it would be a better substitute than Ballistics gel to have a frozen exploded PRD.

Tweak the mix for a softer cure might even get a distribution pattern

Yea that's what I thought of as soon as he was didn't let the epoxy set before doin it. I thought he was going to let epoxy set up and do it from teh title.

I was thinking the same sort of thing! Ballistics gel is literally designed for capturing explosives and seeing how they behave in things!

It sounds poetic lol

Sounded like homo-genius when he said it :p

If the epoxy couldn't hold it, you might get Prince Rupert's Bomb.

That, I believe would give them the ideal for the results they were looking for, I think. They should have suspended a drop in the liquid epoxy, and kept it in the vacuum chamber until it hardened. THEN, when they broke it, it would give them an ideal view into the shatter distribution. Depending on the epoxy used, it might crack, but I doubt it would shatter or become a bomb simply because of the much greater mass of epoxy used.

I've already seen someone try that. I don't remember who, but a quick search should fix that.

@@EbeneezerSquid thats not what they were trying tho. Once its hard it doesnt have that viscosity anymore that allows them to see exactly whats going on. Basically it would break similarish to when broken without the resin id presume.

That epoxy has a compression strength of about 9 to 15 thousand psi. Depending on the brand it definitely won’t become a bomb!! It won’t even crack

Ditto. There would be no room for expansion for the drop when it blew and you may end up with a great looking piece set in the epoxy.

@@RichardGailey worst case is it explodes, but hey thats science 😆

I was hoping for the same experiment. Fully hardened epoxy please.

@@anarchond no it wouldn’t, even just decent quality epoxy is super strong once fully cured.

Rupert's drop in hard epoxy pretty much just turns white. I think it needs to be pretty firm but still liquid enough to run into the cavity left by the exploding drop. Hard to do. As others here have said - a coloured glass drop in clear resin would add more contrast!

This person's understanding may significantly help the project if you do it again. ( I say this TO SmarterEvertDay, Sorry for my bad grammar.)

YES THANKYOU!! It can be mixed easily by hand there’s no reason to make a mix o matic 5000, also I was thinking it would add more air to the mixture (although it will be vacuumed to remove it, it’s still not ideal)

Yup, was hoping for someone to explain this. I use to think using a drill would help, but made it much worse. Mixing by hand for a couple of minutes until no streaks are visible 👌

LOL yes every tumbler maker in the craft world is going NOOOO your mixing it way to fast :P And to many striations in it HEHE

My thought was that he was introducing too much air into the mixture. Like when pulling taffy or making a merengue

That's the calmest I've ever heard someone talk about an explosion.

Thanks for the help!

i remember watching your gang beast videos all the time, man that brings me back to the good old days of legobawse.

Respectfully, you should not phrase your comment this way. It comes off as, "Thanks for letting me shine your shoes".

@@Phil8sheo Recording a video with someone is hardly the same as shining their shoes, but I understand what you mean.

@@Bodhi_Zypha No issue here, your comment didn't give me that sort of bad vibe 🙂

Yup. All I can really say about this video is Destin didn't read the instructions, and totally screwed up a bunch of resin.

Yeah, casting resin may have been better. I'd love to see them experiment a bit more with this concept. Such a cool video!

It does get a flash. You can trigger a bomb or explosives with that you don't need a cap

Or some 'oil' - less liquid than water, yet still clear.

To any one that saw the WhatsApp reply be careful it's a scam

Exactly what I want to see too. Will probably see stress in the box too which would be cool but might interfere with the seeing it in drop, but worth a try. Hmmm, maybe film from above, or shatter in air.

because the powder would just fall to the bottom of the cavity and not be held in position.

@@russellzauner The PRD isn't hollow.

They wanted some give in the fluid so they could see the distribution of fragments mid-explosion

I was waiting for that :(

@@roarkeburnett8208 Yeah I suspect that fully hardened, the resin would crack with the drop, but I'd still like to see how it would look

I came to the comments to suggest this as well!

That's what I thought the video was gonna be about tbh

Yea idk why they didn’t just do that

@@Jarjarvideos Me too.

same. plz do it.

IPA would be a likely solvent, very low surface tension. Suggested the same thing.

You could probably use a water based paint with some dish soap

Jedrek29t did exactly that. He has a video on prince Rupert drops in epoxy, but iirc he let it set completely before exploding them.

You could use a colored uv epoxy in a vacuum chamber and suck it down into the drop before using the uv light to instantly cure it. A collaboration with people who know epoxy would have helped them a lot.

Science is particle accelerators and atom bombs -Mr Grooberson

Safety 3rd in Bama, roll tide

I mean, maybe the gloves for the epoxy splashes, but the glass particles are too small to do significant damage to skin, and too large and heavy to be dangerous for lungs. He's fine dude.

Not to mention a mat underneath, THERE IS GLASS ALL OVER THE PARK.

@David Smith I would hate getting those glass particles into my lungs. I think an average person would gasp at the explosion, and sucking them right in. Do this a few times on camera and a few times off, it adds up.

Yes I want to buy this so bad!

It makes no difference whether you pour A into B or B into A. What does make a difference is as you said, thorough and complete mixing.

I second this. I think there are some good advantages to using gelatin or some other kind of gelling agent. It's not nearly as time sensitive, and unlike timing the viscosity of rapidly hardening epoxy, once it's fully cured the viscosity of a gelled substance is based on the amount of gelling agent you use. This would allow you to create multiple samples of varying states of viscosity to test ahead of time, then create easy to follow recipes to repeat the experiment. Another advantage is that gelling agents dissolve fully in hot liquid and then solidify slowly. No need to off gas the mixture, and you should be able to just clamp the PRD in position, wait for the mixture to cure, and get a crystal clear medium every time. Lastly, gelatin is far cheaper than epoxy.

@@shahared1 I agree with the measurable viscosity of ballistic gel, there are meters that test that, saw it being used on a channel that cuts open shoes and tests the resistance of the cushions and pressure of the air pockets. However it's not a replacement for epoxy resin, it's a different experiment. Epoxy is meant to keep the PRD from expanding to see the shatter pattern. If the epoxy isn't solid enough to resist expansion it allows the PRD to continue shattering into smaller fragments which make it cloudy, but if the resin is hard enough it provides support to limit the spread of the cracks revealing their path.

This was my exact thought when he said he was using epoxy. I was like "why not ballistics gel". Would it not properly retain the shape of the explosion?

@@shahared1 My biggest question with that method is that I think that the number of fragments will make it appear cloudy - I don't think you will get a good view in ballistic gel. The fact that the epoxy hasn't set completely enables it to close the gaps created by the fragments completely. It's a rather cheap test to do, though. It's worth a shot.

I’d like to see this as well. With the high speed cameras, the distribution of fragments in the ballistic gelatin should be visible. . Also! Just try regular food store clear gelatin! Cause there’s always room for Jello

The shockwave would force the oil up and out everywhere which would probably be hot because of the exothermic reaction happening

@@marshall7170 There's this peculiar device called a lid, we put those on tupperware so that food doesn't try to run away from fridges, maybe that will keep the oil inside, just make a little hole in it for the prince rupert's tear and you're golden.

I think a polariscope would give a better visual of the shock wave propagation from the PRD and transferring stress to the epoxy and the plexiglass.

Maybe use a fresh batch of epoxy on top so there isnt any refraction from the different fluids

I don't know why, but after the 1st attempt, I pictured in my mind "boiling" a bunch of glue sticks & pouring that over the Prince...

I came to say basically the same thing, lol. Mix more and maybe use a deep pour epoxy. And smaller containers was a good idea!

Use a mixing nozzle, dump first bit out from nozzle then feed from the bottom of mold. Use a epoxy with slower set time that will help with the bubbles and exothermic run away.

I feel like an art resin would do what he was going for. There are a number of good brands, some ok brands are available at craft stores like Michaels.

Thank you!! Watching the resin flash-cure like that was so painful

@Don't Read My Profile Photo what a pathetic human 😂

the solidification of the rupert drop has absolutely nothing to do with gravity. why do you think something out of the ordinary would happen?

@@danielsteger8456 the tail is formed because of the way the glass stretches as it’s dropped into the water. It can’t be dropped without gravity, but it could probably still be quenched without gravity. The question is asking what would happen in that case

@@danielsteger8456 well the reason it gets its tail is because its falling right?

@@danielsteger8456 absolutely nothing to do with gravity? How do you think the blob of glass coming out of the furnace ends up in the water? Gravity.

Yes. Similar to your car windows (the ones on the door) being impervious to most impacts. Only once you bend the window far enough or scratch the surface hard enough it will break. Same goes for the ball. It will be just really really strong ball.

And don't mix it in the sun. The sunlight makes it kick so much faster.

The epoxy contracting from the inside is the same principle that creates Prince Rupert drops in the first place, right?

That's what I thought too. Also, does the high pressure of the shock wave 'speed cure' the epoxy at all?

It's just a fracture line in the epoxy

He wanted to capture the wave midway.. So waiting for it to smoke and insert at that right moment approach.. Slow curing won't work here..

I'd use agar-agar. It can be made cold and it's super clear for a gel. What's cool about that is you can cast a tool for breaking the tail in with it and encase the entire thing in ballistic gel so it can't easily draw in air like the observation that was made when they finally got it.

It’ll just blow the gel apart

That'd be easy to setup. Just cast it in the gel and let it setup. Make it thicker if you want to reduce the size of the shockwave.

@@mattsnyder4754 surely that would depend on the size of the block of gel. I'm no expert at all but I have seen ballistic gel survive high velocity, large calibre bullets on youtube.

Anyone here whose immediate reaction to Prince Rupert's Tears is to think about early King Crimson? 😏

Yep. I was really hoping to see that.

I’d assume you’d be left with powdered glass sitting in the space where the drop occupied

@@ian5766 exactly

Yes, the first thing I wondered - why do the break while the resin is still viscous? Maybe this experiment would be better using a ballistic gel...

I believe that the cracking of the tail allows air into the internal structure of the drop and due to the way the drop is formed I speculate that there may be a void that was formed inside the drop from the internal glass retracting after the outer glass already hardened. My logic in this reasoning is that the outer shell is like a container for the rest of the expanded glass and as it cools off it retracts and the molten glass either creates a pocket that would normally fill immediately with air if air was present or stretch out the molten glass as it retracts forming void bubbles in the stretched glass due to there not being enough material to fill the gaps that were made present when the internal glass retracted. So when you break the tail due to the air being pulled into the internal structure the force of the air filling the voids is enough to start shattering the walls that would be between the nearby pockets which creates the effect of the drop exploding out from the tail towards the middle of the drop. Due to the most void pockets being present in the middle of the drop, the force of air filling that space causes an outwards explosion. That is just my thought on the matter and what I believe may possibly be happening. It would be difficult to test if this were the case because you would need to test breaking the tail in an area that is void of any oxygen such as breaking the tail in a vacuum. The idea comes from the way water being poured from a bottle and how if you hold an open bottle upsidedown it is slow to pour the contents out because the air rushing into the bottle to fill the void behind the liquid also partially blocks the opening at the neck of the bottle and how the void needs to be filled first before the liquid can leave the bottle or container.

It is a lot, but I believe this may be a reasonable explanation, but who really knows.

Was also thinking about how it would look like when poping it in ballistic gel 👍

My thoughts too

YESSS BALLISTICS GEL!!!

I don´t think ballistic gels really have the rheological profile needed here, plus, they form optical inhomogeneieties once damaged, counterproductive to the purpose.

@Klawofodin me too after I already commented