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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I left scented candles in a polypropylene container. How do I remove the smell?

I left scented candles in a polypropylene container, for many weeks. How do I remove the smell? I've tried: Hand wash with Dish Soap (a few times) Hand wipe with Isopropyl Alcohol (a few times) ...
JJ123's user avatar
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64 views

Is there an effective way to reduce the plastic smell in a new refrigerator?

I just bought a new top-freezer refrigerator from a respected home appliance manufacturer. The freezer, in particular, has an overwhelming plastic smell. Plastic odors are sufficiently common in new ...
theorist's user avatar
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9 votes
2 answers
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Would it be safe to melt plastic bottle caps and remold them into a form?

Ever since I got a dog who loves to sniff and chew most things that come across her path, I have been hyper-aware of plastic bottle caps thrown onto the street/sidewalks/grass/etc. Most caps are HDPE ...
Pamela's user avatar
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2 votes
0 answers
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Naphthalene absorbed by HDPE?

I placed some empty HDPE plastic vitamin bottles in a sealed closet with moth balls, (naphthalene, d-diclorobenzne.) Years later I found the mothball smell had somehow gotten into the bottles, and no ...
Dan Jacobson's user avatar
3 votes
0 answers
28 views

Can multispectral imaging be used for identification of materials, substituting for hyperspectral imaging?

Nowadays a lot of research and applications are using Hyperspectral Imaging for identification and segregation of plastics by material. But the cost of a HSI system is quite high. Could a ...
Aether's user avatar
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1 answer
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Can plastic items of same type but different rigidity be recycled together?

Quite often we find plastic items of different rigidity which belong to same type. For instance, LDPE is used mostly for films and bags, but sometimes thick and rigid containers are also made. Can we (...
Aether's user avatar
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Can Seaweed Be a Thermoplastic?

I was on the Internet, and I saw this post. This post shows a photo of thermoplastic seaweed, which I thought was impossible. ` BTW, if you're wondering what the difference is between a thermoset and ...
Charlie Nicholson's user avatar
0 votes
1 answer
48 views

Safety of an organic solvent in a sealed pressure pot or vacuum chamber

I am trying to experiment and find ways I can reuse various types of thermoplastics at home for hobby use and have investigated various solubilities of them in solvents (room temp or otherwise) to ...
Nick Perry's user avatar
-1 votes
1 answer
133 views

Help with replicating Fionn Ferreira's microplastic experiment

Hi I am an eighth grade student doing my first science fair project on microplastics. The first step of my experiment is replicating F. Ferriera's microplastic experiment where he used magnetite to ...
Jack R.'s user avatar
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1 vote
0 answers
32 views

What common plastic types would be most compatible with pool water?

What thin-film plastic types are most compatible with typical pool water (pH 7.2, normally 5ppm chlorine but up to 15ppm on occasion) in full sun? I'm finding that most standard film materials degrade ...
rdtsc's user avatar
  • 143
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How does the heat-activated blowing agent in foaming plastic filament survive the manufacturing process?

Special 3D printer filaments are available with blowing agents mixed in. These blowing agents cause the filament to foam as it is extruded, causing the resulting structure to have a much lower density....
Kenn Sebesta's user avatar
0 votes
2 answers
3k views

Burning Plastic: can it be done without harmful pollution? [closed]

Can plastic be melted, incinerated or recycled without emitting harmful gases and CO2? Specifically, can this be done without releasing gases harmful to humans? This question pertains to the melting ...
Nick's user avatar
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2 votes
0 answers
148 views

What will remove this screen printed logo without destroying the polycarbonate safety sunglasses lens?

I bought some safety sunglasses and didn't notice until I'd taken the tags off that there's an annoying logo painted or printed right in my field of view. (You can feel with your fingertips or ...
Dennis's user avatar
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130 views

Is there really no solvent (or any other really) glue for polyethylene terephthalate?

PVC can be glued well with solvent cement wherein it melts somewhat and then sticks together really well as if it was welded, which is really convenient. But I can't find anything similar online for ...
wusspuss's user avatar
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0 answers
44 views

Why do the links in a plastic chain become different colors?

I have a plastic chain, about 5 meters long, sitting between two wooden posts. The link has 1 meter long sections of alternating white/red links. It's been sitting there for 2 years, and the once red ...
Magnus's user avatar
  • 109
-1 votes
2 answers
701 views

How long can dimethyl sulfoxide be safely stored in a HDPE "barrier bottle"?

How long can dimethyl sulfoxide be contained in a HDPE barrier bottle without any reaction between the plastic and the solvent? I have read that DMSO is not reactive with HDPE, but I would like to ...
WishyQ's user avatar
  • 99
2 votes
1 answer
568 views

How long can I keep HDPE plastic in an oven for before it starts to burn?

I am recycling HDPE plastic (chips) in an oven. I left it in the oven for 10 mins and it melted the outside layer of the plastic fine. When I cut into the plastic with a saw after it cooled, there was ...
user2829154's user avatar
-1 votes
2 answers
286 views

Are intermediate bulk container units suitable for storage of isopropyl alcohol? [closed]

I'm working in water treatment construction and my boss is going to be stocking isopropyl alcohol (IPA). He wants to store the chemical in bulk, with amounts ranging from 5000 L to 10000 L in IBC ...
Imran Munir's user avatar
1 vote
0 answers
26 views

Is there a stretchable, transparent polymer like PDMS, but not so hydrophobic?

I'm looking for something like PDMS, but not as hydrophobic. I'm trying to form 2d crystals using the surface tension of an evaporating droplet to organize microspheres into an ordered array. PDMS ...
Thomas's user avatar
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0 answers
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Commercially available conductive polymers

I am looking for intrinsically conductive plastics (not plastics that are made conductive by filling them with carbon black for example). I have found that there are conductive polymers like ...
x3b7z99's user avatar
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2 votes
0 answers
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Can I degrade PLA into something usable?

I have a lot of 3D printer waste and don't have a recycling machine for it. As a side project, I was wondering if there is any way to degrade/compost/recycle it meaningfully. I have my Uni's chemistry ...
Genesis Of Gaming's user avatar
1 vote
0 answers
31 views

Do mechanically recycled plastics decompose more rapidly?

Does it mean that mechanically recycled plastics decompose more rapidly in the environment? So even if mechanical recycling doesn't prevent plastics from going to landfills, just puts it off (...
Sergey Zolotarev's user avatar
-1 votes
1 answer
53 views

How to prevent Sodium Hydroxide (Catalyst) from reacting with the Formic Acid (product) after electrolysis is done [closed]

So, I am trying to create Formic Acid from PET and to break the ester bonds before electrolysis, I am planning on using water and sodium hydroxide. I was told that if I take this Plastic-Sodium ...
Tsar Asterov XVII's user avatar
1 vote
1 answer
87 views

Can large, sticky, sodium polyacrylate crystals be coated in a powder to facilitate handling?

I am separating a larger container of sodium polyacrylate crystals into smaller containers for student experiments. Commonly known as "Deco Cubes" and used by florists in decorations and ...
Lenny Dalrymple's user avatar
0 votes
0 answers
72 views

What is the difference between PEF and PTF bioplastics?

I am trying to research single use plastics replacements, and wanted to explain how PEF and PTF are a good choice. Although as I am researching I can't find clear information about them, also how they ...
mathcat's user avatar
0 votes
0 answers
73 views

Organic solvent that won’t attack either PET or butyl rubber?

I am looking for a suitable organic solvent for dissolving dried-on polyurethane adhesive on a substrate of nylon/butyl/polyester. Acetone is ruled out because it attacks polyester (PET) and Toluene ...
crater33's user avatar
14 votes
1 answer
6k views

What causes plastic to become brittle and can it be softened again?

I have some old computer case parts made of ABS plastic. Two decades of storage has embrittled the plastic to the point where they easily crack or shatter with the slightest bend. What is going on ...
user148298's user avatar
2 votes
1 answer
55 views

Transparent material used in the movie Metropolis

This is probably a rather unusual question for this forum. The review of the movie Metropolis (made in 1926) by Roger Ebert shows what I assume is a still frame from the movie: The shield looks very ...
trunklop's user avatar
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1 vote
0 answers
234 views

Natural preservatives of ink

Would pure compounds like thymol, carvacrol, and cinnamaldehyde work as preservatives of fountain pen ink? I'm specifically interested in three properties - Prevention of growth (mostly fungal) in ...
Inkman's user avatar
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1 vote
0 answers
14 views

Using cooling to temporarily lock in deformation in plastics?

I need to shrink PEEK or solid polyimide tube, $\pu{1mm}$ wall thickness and $\pu{15mm}$ OD over another fragile component. Is it possible to stretch the tube over a mandrel, lock in the deformation ...
Steve's user avatar
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2 votes
1 answer
464 views

Making bioplastic at high school level chemistry using PLA/Starch blends

I'm currently working on a high school chemistry essay about biodegradable plastics. I know that there is an easy way to synthesize Thermoplastic Starch (TPS), a starch-based bioplastic using glycerol ...
G Song's user avatar
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1 vote
0 answers
539 views

Absorption spectrum of common plastic polymers

I am looking for data regarding absorption spectrum of common used plastic polymers, in the range of 200- 1.000 nm Moreover, I am looking for inorganic or organic compounds, which can be mixed ...
Francesco's user avatar
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5 votes
2 answers
258 views

higher viscosity base oil instead of better lubrication results in worse

UPDATE: The problematic "symptom" that I try to fix, is the static friction of two sliding plastic parts. This is about a keyboard key switch that was made during the 80s. The problem/issue ...
J. Koutsoumpas's user avatar
0 votes
1 answer
65 views

A useful way to reuse non-recyclable plastics: Turn them to petrochemicals, shall we?

I read here (https://chemistry.stackexchange.com/a/34016/101483) that strongly acidic catalysts can facilitate dimerization of alkene. With catalysts on zeolite to allow only the isooctane (octane ...
Kav's user avatar
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1 vote
0 answers
173 views

Dissolving CNE (cresol novolac epoxy) resin covered computer chips

I intend to destroy (dissolving would be optimal) a few computer chips (NAND memory chips used eg. on SSDs to be precise). Why? See foot note. I am not a chemist, so of course I tried to research the ...
solidsnake's user avatar
3 votes
1 answer
634 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 ...
Alex's user avatar
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1 vote
0 answers
32 views

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 ...
Richard Magnus's user avatar
0 votes
0 answers
298 views

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 ...
JCSB's user avatar
  • 101
1 vote
2 answers
71 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 ...
Mat NX's user avatar
  • 155
1 vote
1 answer
245 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 ...
Muhammad's user avatar
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2 votes
0 answers
121 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 ...
loudaslife's user avatar
4 votes
0 answers
56 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 ...
Bart Yarborough's user avatar
2 votes
0 answers
132 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 ...
Ray's user avatar
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1 vote
0 answers
259 views

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. ...
Peter's user avatar
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1 vote
0 answers
50 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 ...
Hans's user avatar
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-2 votes
1 answer
88 views

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 ...
WarFireSonBix's user avatar
2 votes
1 answer
716 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 ...
david's user avatar
  • 169
0 votes
1 answer
70 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?
Zayas12's user avatar
  • 11
-1 votes
2 answers
6k 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. ...
gfdsal's user avatar
  • 189
1 vote
1 answer
830 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'...
James Wilson's user avatar