Can ABS Plastic Be Safely Broken Down for Recycling?

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Discussion Overview

The discussion revolves around the potential methods for breaking down ABS plastic for recycling, including concerns about its carcinogenic properties and the environmental implications of plastic waste. Participants explore various approaches, including enzymatic breakdown, thermal recycling, and alternative disposal methods.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants inquire about processes to break ABS plastic down into safe, non-carcinogenic chemicals or its basic elements, suggesting the possibility of enzymes for this purpose.
  • Concerns are raised about the carcinogenic nature of one of the monomers in ABS, with some arguing that the polymer itself is harmless when intact.
  • A participant suggests that breaking down ABS could lead to harmful byproducts, advocating for recycling or reuse instead.
  • Alternative disposal methods are proposed, including burying ABS for carbon sequestration and even extreme suggestions like shooting it into the sun.
  • Some participants emphasize the need for controlled processes to break down plastics to prevent environmental contamination.
  • There is mention of the recyclability of ABS plastics and the increasing popularity of recycled ABS in manufacturing, highlighting economic considerations.
  • Questions arise about the physical properties of recycled ABS and whether it can be effectively reused in 3D printing applications.

Areas of Agreement / Disagreement

Participants express differing opinions on the best approach to handling ABS plastic, with some advocating for recycling while others propose destruction or alternative disposal methods. There is no consensus on the most effective or safe method for breaking down ABS plastic.

Contextual Notes

Participants note the complexity of the chemical processes involved in breaking down ABS and the potential for harmful byproducts, but there are unresolved questions regarding the effectiveness and safety of various proposed methods.

LightningInAJar
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TL;DR
How?
Is there a process to break ABS plastic down into safe non carcinogenic chemicals? Maybe even down to its basic elements? Maybe an enzyme exists? I want to recycle my 3D printed objects that didn't turn out well.
 
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LightningInAJar said:
Summary:: How?

Is there a process to break ABS plastic down into safe non carcinogenic chemicals? Maybe even down to its basic elements? Maybe an enzyme exists? I want to recycle my 3D printed objects that didn't turn out well.
Is ABS carcinogenic?

To recycle, just reheat.
Or perhaps you need smaller pieces by just grinding the bad part up.
 
256bits said:
Is ABS carcinogenic?

To recycle, just reheat.
Or perhaps you need smaller pieces by just grinding the bad part up.
At least 1 of three chemicals in ABS is cancer causing. It is stable when combined hence why it can be used to make Legos. But I don't want to reuse the plastic. I would prefer there be less of it left on Earth by breaking all the bonds in it.
 
LightningInAJar said:
Summary:: How?

Is there a process to break ABS plastic down into safe non carcinogenic chemicals? Maybe even down to its basic elements? Maybe an enzyme exists? I want to recycle my 3D printed objects that didn't turn out well.

LightningInAJar said:
At least 1 of three chemicals in ABS is cancer causing. It is stable when combined hence why it can be used to make Legos. But I don't want to reuse the plastic. I would prefer there be less of it left on Earth by breaking all the bonds in it.
This is not how chemistry works. The polymer isn’t carcinogenic. Acrylonitrile is, but it’s one of the monomers. The polymer is perfectly harmless as it is, but if you were to “break down” the polymer into its constituent monomers, you’d end up with a stinky poisonous soup. Best case scenario, you burn it all completely and end up with a bunch of CO2. More likely is it wouldn’t burn completely and the fumes would contain the carcinogen that you seek to avoid. The best thing you can do is recycle or reuse the harmless plastic.
 
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You could bury it as a form of carbon sequestration.
 
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There are too many plastics out there. At some point we will need to break it down completely. It would need to be well contained in any process to break it down. But in my mind it makes more sense to do it in a controlled fashion than have it end in the ocean or a landfill and end up in water supplies. Maybe a UV laser could break even the CO2? Or like I said before, an enzyme that can eat it and output something safer?
 
You could shoot it into the sun to reduce it to atoms.
 
LightningInAJar said:
There are too many plastics out there. At some point we will need to break it down completely. It would need to be well contained in any process to break it down. But in my mind it makes more sense to do it in a controlled fashion than have it end in the ocean or a landfill and end up in water supplies. Maybe a UV laser could break even the CO2? Or like I said before, an enzyme that can eat it and output something safer?
What makes you think there are too many plastics? And why does that make destruction a better alternative than recycling? And what makes you think that the energy and processes used in destroying that plastic will be better than letting the plastic remain?

If you think there are too many plastics, then the answer is to stop consuming things made from plastic. Are you simply never going to use your 3D printer again? Or are you just going to go out and buy more plastic to feed it instead of recycling what you already have?
 
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TeethWhitener said:
What makes you think there are too many plastics? And why does that make destruction a better alternative than recycling? And what makes you think that the energy and processes used in destroying that plastic will be better than letting the plastic remain?

If you think there are too many plastics, then the answer is to stop consuming things made from plastic. Are you simply never going to use your 3D printer again? Or are you just going to go out and buy more plastic to feed it instead of recycling what you already have?
The more we use the more we buy. I don't know who specifically recycles ABS. I know the filament requires a higher temperature each time it is melted which causes nozzle clogs unlike PLA plastic. I don't know if recycling resets its physical properties. Who could I send old part to to make it usable again?
 
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@Keith_McClary gave an example in the post directly above yours. @BillTre gave an example of simply burying the plastic that serves as a carbon sink. The point is that you’re not going to do better decomposing the plastic than you would recycling it. It’s a noble goal to try to keep hydrocarbons in the ground, but once they’re out of the ground (in the form of ABS plastic, in your case), it’s best to use them to their full extent.
 
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