Questions tagged [plastics]

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

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18 views

Where is the yellowness and the metal traces in polyvinyl alcohol coming from?

I use polyvinyl alcohol for my experiments (purchased from a major company). I observe yellow particles in the batches. When I analyze the particles with SEM/EDS, it shows up that there's traces of ...
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1answer
39 views

Oily residue on old toy rubbery tyres

I have some sets made by well-known Danish plastic toy manufacturer from my childhood which I've been reviewing recently. Most of the elements was in a condition I was expecting (some yellowing, a ...
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What is the viscous component in viscoelastic materials? [duplicate]

All real solid materials are in certain way viscoelastic, because an ideal fully elastic material doesn't exist as well as a fully viscous solid material. According to rheologic models it is possible ...
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treating PLA (Polylactic acid) plastic to make it biodegradable

I am using PLA for 3D printing, and I know it does not degrade well in the wild. I would like to know if there is a chemical process I could use to treat it at home. Specifically, I am looking for a ...
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Does dyeing ABS plastic make it harder?

It has long been suspected by some in the speedcubing community that primary ABS plastic is "softer" compared to dyed plastic that is black or white. By primary plastic I mean undyed plastic,...
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Readily available PVC plasticizer

I'm looking for products that can be used as non-toxic PVC plasticizers. I've used ATBC as a product that I can add to, for example, the inside of a pool toy, which with time absorbs it and becomes ...
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2answers
59 views

Searching for a fireproof sponge?

(I know this is a bit off topic, but I don't know where else to ask. If you know a better StackExchange site, please tell me) I'm working on a project, and I want to basically create a "flaming ...
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1answer
130 views

The desirable property of plastics [closed]

My teacher once asked me that "one desirable property of plastics is that they can be made into very complicated shapes, Explain how this is done as a reaction" I never know how to answer ...
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31 views

Does mercury react with polycarbonate?

Looking around at various material compatibility charts, they seem quite divided on the compatibility of metallic mercury and polycarbonate. Some sources (here, here, or here) indicate that ...
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48 views

“Nivea Sun protect & refresh” melted my tub

I stupidly applied spray sunscreen on my children inside our white, acrylic bathtub and the floor ended up with a white, very sticky residue that rubs off on things, but will not wash away with ...
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22 views

Permanent ink from urethane, 99% IPA, and pigment?

I’m an artist and I started working with recycled plastic bottles as a material recently. I want to paint the plastic and retain its transparency, but acrylic paint won’t stick without priming and ...
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Does #4 LDPE Plastic Bottle Leach into Water?

I understand that Water Bottles expire due only to the fact that the plastic can degrade over time and leach into the water making the water's taste not as desirable as the manufacturer might intend. ...
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21 views

HDPE vs PP for storing pure aldehydes

I know both HDPE and PP have at least some degree of resistance to aldehydes, esters and aliphatic hydrocarbons. I am concerned however about minute contamination over time of pure samples and so I ...
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1answer
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I want to purposefully dry up (polymerize) an entire bottle of ethyl cyanoacrylate (Super Glue). How to do it?

So, I want to do some tests with the solid form of ethyl cyanoacrylate. I have a small 20g bottle which was very cheap so I don't mind. How can I cause the entire contents of the bottle to set and ...
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1answer
42 views

Plasticisers and other impurities from polyethylene laboratory bottles?

Does polyethylene (PE), widely used for wash/squirt bottles in labs, contain soluble compounds such as plasticizers that can accumulate in organic solvents (e.g. alcohols, acetone) after prolonged ...
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1answer
21 views

Will toluene vapors damage a mirror made from PETG?

I'm working on a project for work and trying to avoid using an acrylic mirror because I know that doesn't hold up well against toluene, but I'm wondering if a mirror made out of PETG would?
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2answers
613 views

Fumes by Melting Aluminium Soda Cans [closed]

I am planning to melt and cast aluminium from soda cans. I went to quora page that deals with "burning" aluminium can, which can release toxic gases as the cans are coated with plastic inner lining. ...
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1answer
254 views

Is corovin Polypropylene or flat polyester?

I'm wanting to know what material 'corovin' is as described on some duvet covers. Googling it, some places say it is just another name for 'Polypropylene' while other places say it is 'flat polyester'...
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1answer
3k views

What type of plastic (PET, HDPE etc.) is appropriate to store alcohol based hand sanitizer? [closed]

I’ve been tasked with distributing hand sanitizer to public safety staff from a bulk supply in gallon jugs. I need a portable squeeze bottle, but I’m having trouble determining what type of plastic (...
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19 views

Siloxane permeable to oxygen but not water

I want to purchase a siloxane plastic that is permeable to air but not to water. Any suggestions for what I should ask for, or are all waterproof silicon plastics permeable to air? Thanks.
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59 views

At what temperature does a polyester release toxic gases?

I've bought a "Shrinky Dinks" printable sheets and now I'm feeling unsure about using it since I've read that heating polyester materials may be very harmful for health, and the final purpose of this ...
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2answers
702 views

Would ABS plastic degrade in a dishwasher?

I printed an object with a 3D printer and I used a roll of light green ABS plastic filament. I would like to use the dishwasher to clean it. The temperature would be kept below 70°C, well below the ...
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3answers
2k views

Acetone-resistant clear plastic

Is there a plastic that's clear, acetone resistant, and ideally sold in sheet stock that's ~1/8" or 1/4" thick? Both acrylic and polycarbonate are out, they turn cloudy on contact with acetone. I ...
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2answers
47 views

What can I use to remove print from hard surfaces?

I have a lot of profile products with the logotype of the company handing them out printed on them. In some situations I don't like to show these logos. However, it is stupid to bin working products ...
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1answer
94 views

Does clove oil/eugenol interact with nylon type plastics?

So I am aware that the eugenol in clove oil readily melts #6 type plastic (polystyrene). Polypropylene has a higher resistance, while HDPE type plastics seem to have the highest resistance. My main ...
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PP05 plastic “not dishwasher safe” but does not deform? Leaching chemicals? [closed]

It's plastic shaker cups, they came with instructions saying they are not dishwasher safe but they did not deform in the dishwasher. Does this mean it's probably unsafe to clean them using the ...
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29 views

Dissolving plastic resin without damaging aluminium surface

I have an aluminium surface covered with some plastic, which I intend to dissolve in order to clean the surface. On the note for the plastic I have applied, it says that it contains the following: 2-...
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450 views

What does it mean “polyester doesn't breathe”?

Often people say buy a cotton shirt because cotton "breathes" but polyester doesn't. (i.e. it makes you hot sweaty). What is the scientific meaning behind this? How does polyester trap the heat more ...
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17 views

Plastic bags broken down by soap fumes [closed]

I've searched online, but have not found anyone that has experienced the same. I have a 20 gallon plastic tub with a lid. In it keep plastic shopping bags. Also had a box of detergent in there. I ...
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2answers
171 views

Why aren't plastic bottles of coca cola full of microplastics?

My understanding is that disposable plastic water bottles should not be reused or used at all after some time, because the bottle will eventually leech microplastics into the water. Since coca cola is ...
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1answer
77 views

Is it possible to make micelles to pick up Microplastics from water?

I'd like to know if I could get micelles to pick up microplastics in water. I read that microplastics are sometimes charged, so can we make the lyophobic end to pick up microplastics, so that they can ...
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178 views

Is there a heatformed vinyl-like plastic that is hard as shellac when cold?

I recently started collecting shellac records, and got the idea of releasing my own music on 78rpm shellacs. But the exact formulas and techniques for making shellac records seems pretty much lost to ...
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120 views

How to dissolve PLA/PCL/PMMA?

I have a research about electrospun membrane synthesis where I dissolve PLA pellets in chloroform:methanol (3:1) for 3 hours and also PCL pellets in chloroform:methanol (3:1) for 3 hours too. Another ...
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1answer
91 views

Using an oxidizing agent to improve combustion of a fuel [closed]

If I were to add an oxidizing agent like dilute Potassium permanganate (aq) to a potential fuel such as plastics (polystyrene etc), would the combustion of this fuel be more complete ie: less sooty ...
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155 views

what are the cons of converting plastic to fuel

I have been trying to read how to fix plastic problems, there seems to be 3 outstanding solutions Re-use Recycle Decompose to Fuel Recycling is expensive, requires lots of water and the quality ...
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60 views

Maximum lifetime of plastic on earth

[EDITED] If humans disappeared today, and aliens visited in the future, for how long would plastic or other "obviously" non-natural polymers be detectable on the planet, using known or plausible ...
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23 views

How can I know the composition of a gas pocket entrapped in a plastic sheet? [closed]

I have a 1 mm thick plastic sheet, the plastic is not opaque. Some gas pockets, I would say some bubbles, are inside the sheet; the size of the bubbles is about 1 mm. What methods are available to ...
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1answer
371 views

What chemical could dissolve low-density polyethylene?

What chemical could dissolve plastic aside from acetone? Preferably, low-cost and environmentally friendly. Any suggestions would be helpful. I'm targeting for thin plastic (low-density polyethylene)....
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74 views

Which transparent plastic to use for electrolysis of dilute sulphuric acid

I plan to do an experiment which involves the electrolysis of dilute sulfuric acid (1 M or 1 mol/L). I would like to carry it out in a long transparent plastic container (easier to handle and clean). ...
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47 views

Would the mixture of Latex Rubber and the Squid's chitin make a biodegradable plastic?

I don't know much of Chemistry but I put the chemical structures of each. Thank you!
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40 views

What was the process that created a plastic-looking material from the jam leftovers? [closed]

I was making apricot jam using fresh apricots and gelling sugar. All went well except I burnt it. Some of the solid parts sank to the bottom and stuck there. After putting the good stuff in jars, I ...
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2answers
42 views

Are any commercial plastics made from biomass/plant matter?

Are any commercial plastics made from plant matter currently. I expect it can be done in a lab but I am wondering about cost competitive tonnage quantities.
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54 views

What determines 3D printing material compatibility?

3D printing, specifically the type common for consumers FDM or FFF, involves laying down thin (typically 0.1 to 0.2mm) layers of molten plastic. Modern consumer printers can use various filaments: PLA,...
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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" ...
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1answer
177 views

Suitable coating material for protection of sensors

I'm building a moisture/temperature sensor for outdoor use in soil. It uses capacitive sensing for moisture and an NTC thermistor for the temperature. It's going to be used for vegetables so food ...
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0answers
45 views

How do we know if a newly developed chemical compound has any taste or is tasteless?

I was reading this about polystyrene, which says: "Polystyrene is an odorless, tasteless, rigid thermoplastic", and got hung up on "tasteless". I searched Chemistry.SE for "tasteless" and found this ...
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60 views

Spraying aluminium hydroxide nanoparticles onto PLA as fire retardant?

Several scientific papers study FR-PLA (fire resistant PLA) in which Aluminium Hydroxide nanoparticles are melt blended into the PLA (example source: Advances in Flame Retardant Poly(Lactic Acid). ...
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27 views

Solving Polyester but no chromed steel [closed]

In short I'm looking for an acid that can solve a polyester, fiberglass composite. However it cannot damage steel. First of all i like to say that i'm not a chemist. I work in a plastic moulding ...
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37 views

what is the basic idea for making bioplastic? [closed]

I have the following questions about making bioplastics: Why is only lactic acid used in making bioplastic? Are there any other methods used in making bioplastic without converting starch into lactic ...
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1answer
2k views

What kind of plastic is (really) safe to store vegetable oil?

Storing colza or olive oil in a plastic bottle might be risky since the oil can leach out phthalates and BPA (and others molecules?). Some manufacturers sell "phthalates and BPA free bottles", but ...