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Posted

Something I never really thought about is VOC's with CA.

This is the top from a candle it's glass and my CA method is that I put a little puddle like where it shiny now near the bottom of the photograph. I put a little puddle there and then I use a toothpick or some fine pointed object to get the CA.

The cloudiness that is all around the outside of that is on the outside and that is what has evaporated or whatever deposited on the outside.

Freaky

IMG_7861.jpeg

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Posted

I'd wonder if your glass lid has a thin layer of plastic to help keep it from breaking or to make it safer to handle if it breaks?

To answer your question about evaporation, most plastic model cements cure by evaporation of a solvent.  I believe ACC reacts with elements (hydrogen?) in the air. 2-part products usually have a chemical reaction, with some kind of off gassing. I don't know much about the UV cured glues.

Posted (edited)

From the American Chemical Society site: 
“Ethyl 2-cyanoacrylate and its cousins polymerize instantly in water. The small amount of moisture in air is enough to initiate polymerization. The polymer forms within a matter of minutes, creating a bond that is often stronger than the materials it joins.”

It will also react with cotton and some other materials creating fumes.

Edited by NOBLNG
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Posted

I put superglue on a plastic lid (like from Pringle's, etc.). I have a dowel that I mounted a sewing needle in, to apply it, but, I digress--that plastic lid gets all crusty, like that, too. For a time, it'll sort of peel off, but, after a while, it seems to embed itself, and won't come off, anymore. That's when I toss it. The applicator's been around, for years. I've replaced multiple needles, in it, and the dowel, itself is polished, from use.

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Posted

Cyanoacrylate is one of the "C"s in ACC/ superglue. Polymerize in simple terms is a chemical reaction. The gasses created and released during polimerization can further react with other materials in the immediate area. If you ever experienced fogging of clear and /or "chrome" model parts when using ACC, this is why. 

 

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Posted
56 minutes ago, rattle can man said:

Cyanoacrylate is one of the "C"s in ACC/ superglue. Polymerize in simple terms is a chemical reaction. The gasses created and released during polimerization can further react with other materials in the immediate area. If you ever experienced fogging of clear and /or "chrome" model parts when using ACC, this is why. 

 

So this is the idea how forensics lifts fingerprints on delicate surfaces with it?

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Posted

I also use shiny thin post card ads that come in the mail. I cut them into little squares, use once and chuck them. 

I keep an old paper coffee cup on the bench that I throw all scraps into. When it gets full, I toss that.

Posted

I often see "frost" forming on plastic (polyethylene) CA glue bottles in extended storage in humid environment.  The frost even extends onto the surrounding surfaces.  Seems that CA has the ability to permeate the polyethylene because the bottles are not open (airtight). The frosting even shows up on metal or glass surfaces (like what Alfred shows).  I don't think it is due to VOC contents.  I'm not a chemist but I believe VOC is really about solvent evaporation. CA is a liquid resin which hardens by polymerization - it doesn't contain a solvent.

Posted

As stated superglue/ACC dries by polymerization. Polymerization is a chemical reaction that does emit gasses (not necessarily VOCs) that can affect other materials. Plastic cement and other types of glue do dry by solvent evaporating.

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Posted
On 12/21/2024 at 2:20 PM, Rick L said:

I use water bottle caps for dabbing CA and mixing small amounts of paint. When done toss away.

thats my go to,i use spring water bottle caps and my glue looper....game changer for me

Posted

Working excessively with CA without ventilation can cause harm to your respiratory system. A colleague of mine worked with it on a model project years ago and any time he got a simple whiff of the stuff he went into sneezing fits. Kind of funny though.😆

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