Questions tagged [plastics]

For questions relating to the structures, properties, production methods and potential hazards of polymer materials commonly known as plastics

Filter by
Sorted by
Tagged with
27
votes
2answers
3k views

Ripping apart plastic: is this a chemical or physical change?

I was holding a piece of plastic earlier, and I ripped it in half. This caused me to start to think about what was happening at the atomic level. If the plastic is being ripped, clearly bonds are ...
23
votes
1answer
16k views

What makes ABS plastic turn yellow?

If you owned old kitchen appliances or old computer you might notice that they the once cream white plastic become increasingly yellow, old and disgusting. I have read that UV lighting can damage ...
17
votes
2answers
6k views

Why do many transparent plastics turn opaque when deformed?

Many transparent plastic materials, rigid or not, turn opaque (white) when subjected to stress, deformations or when folded (if not rigid) . The effect seems to be irreversible. What is the cause? ...
8
votes
7answers
30k views

How to dissolve PLA (polylactic acid)?

I'm a maker and I've been interested in 3d printing for years. I have found a technique for dissolve the PLA supports in a model printed in 3D in HIPS I have printed the model in HIPS and the ...
10
votes
1answer
6k views

How do cloves break down plastic?

When my family buys powdered cloves in bulk, we put them in plastic until we get home - which takes at very most an hour. As soon as we get home, we transfer them into glass because we have had issues ...
6
votes
1answer
10k views

Does melting HDPE plastic produce toxic fumes? (melting, not burning)

● The question isn't about burning HDPE but melting it at the proper temperature. (At 120 to 180°C depending on it's density, it becomes gooey. According to the source below the "extrusion" ...
1
vote
1answer
300 views

Can plastic be used as fuel for vehicles? [closed]

I don't have much of a background in chemistry, but I know that plastics are largely made of carbon, as is oil. Is there any way to "covert", i.e. a plastic water bottle, into a substance that can be ...
0
votes
1answer
3k views

Why do bubbles form on the side of a plastic bottle?

I have a plastic bottle filled with drinking water where only one side of the bottle has air bubbles. I know that water is not pure and there are dissolved gases, and my theory is that there are small ...