Questions tagged [adhesion]

Adhesion refers to the attractive forces that exist between two materials. Questions that are based on these attraction forces, e.g: surface tension, contact angle, capillary rise, should use this tag. use with the tag: [surface-chemistry]

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Is this plastic clip made of polypropylene or polyethylene? [closed]

I am trying to re-attach an automotive clip (painted plastic with a yellow (epoxy?) hard adhesive backing) which secures a trim piece back onto the vehicle's roof sheet metal (unpainted (primed?) area)...
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Nanocomposite hydrogel for wet adehsion in biomedical applications

My name‘s Tristan and I‘m a bachelor‘s student in Germany. I‘m trying to synthesize an injectable nanocomposite hydrogel for wound closure and wound healing applications. The problem is that, next to ...
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Why does contact glue get stickier (to itself) as it dries?

I'm thinking of that type of glue that you apply to both sides, let dry and then press together. Like this. It seems counter intuitive. Other glues behave in the opposite manner, and get less sticky ...
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Relationship between surface energy of liquid and solid states

I have been experimenting with different kinds of hot-melt (hot glue) adhesives. I have been comparing EVA to acrylic on various substrates. In comparing the two I have found the acrylic to be ...
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What will a polyurethane resin not adhere to?

For making a mould out of the bicomponent polyurethane resin kit that I have - I am going to need to take out the mould from its form. The mould is what I am actually making from the bicomponent resin....
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Breaking/reducing water adhesion with an electric field

Does anyone know if the presence of an electric field can help to reduce water adhesion to a surface?
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What are some materias/substances that can be applied to a ball such that the ball will stck to a wall,if thrown

I am trying to make a prototype for the "valkyrie camera" seen in the video game Rainbow 6 Siege This is how it works https://gfycat.com/impressivegrippingauklet the black ball seen is the ...
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What's the mechanism behind mineral oil loosening cyanoacrylate bonds?

Per industry literature I found that mineral oil is used to loosen out "super glue" and aid in removal from skin. I am exploring the chemistry of this loosening and I am intrigued. Please help me find ...
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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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Is there a scale for stickiness of glue? [closed]

Non-specialist question stemming from standing in front of a dizzying aisle of consumer adhesives... These differentiate themselves via meaningless superlatives like "serious", "extra" and "ultra". I ...
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Gluing bakelite together

I have an older stainless steel saucepan with what I've always called a Bakelite handle. The pan fell, the handle broke. If possible, I'd like to glue it. The break is near where the handle ...
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2k views

Crazy glue vs Nail glue

So I have a nail repair kit, consisting of nail glue(ethyl cyanoacrylate), powder and a nail buffer. I'm almost of out glue yet stick have a bunch of powder. One of the crazy glue tiny bottles has ...
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Weak adhesives, has some critical chemical been banned? [closed]

I notice that in the last 10 years or so, the adhesives I encounter in everyday life have gotten noticeably weaker, is this because some critical chemical has been banned or regulated out of consumer ...
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How to make sure molded silicone rubber adheres to the ABS mold?

For one of my experiments I need to coat a 3D printed ABS part with a thin layer of silicon rubber: Basically I want to make sure the molded silicon will adhere to one mold (the negative side in ...
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86 views

Near melting thermoplastic material accumulates in the sharper corners. What is this phenomenon?

I have a part made of a thermoplastic material. When I heat it up and cool it down, the dimension of the part changes non-uniformly. Somehow the melted material tries to fill the sharper corners. So ...
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What gives saliva its adhesive properties?

The act of sealing off an envelope by licking the flap and "gluing" it down so that the envelope becomes closed rather tightly is probably rare nowadays, but remains well known to many people. I was ...
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164 views

How does water freeze and crystallize on a cold superhydrophobic surface?

Superhydrophobic surfaces are nano-structured to "repel" liquid water and there has been a lot of work done to understand the microscopics of wetting of these nanostructures. What I currently am ...
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Why are glues/adhesives made up of polymers?

Why are glues/adhesives made up of polymers? Can monomers be used to make an adhesive. What is is about the fact that the molecules are stuck together in a chain that make them better/more useful as ...
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762 views

Why does rice become sticky after cooking?

Rice when not wet isn't sticky at all. But when you soak it in water for some time it gets sticky. What's the chemical change that occurs in rice that makes it sticky?
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5k views

Are there types of glue that are designed to be dissolved easily?

I've heard that some types of glue are easily dissolved. For example, wood glue dissolves in vinegar and super glue dissolves in acetone. This doesn't mean that wood glue or super glue were ...
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Salt and sugar surfactants?

How do daily compounds such as table salt ($\ce{NaCl}$) and sugar ($\ce{C6H12O6}$) affect adhesion or surface tension of water? Considering their polarity, I guess they both increase it.
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Why non polar liquids wet non polar surfaces better than polar surfaces?

In semiconductor industry adhesion promoters (such as HMDS) are applied on various surfaces to improve adhesion between the surface and the photoresist: On SiO2 and many metals surfaces, the air ...
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Work to overcome adhesion of a liquid to a solid

I'm interested in the van Der Waals force of a liquid adhered to a solid. For example, if you spray some water on a vertical piece of glass, the little droplets with adhere to the window rather than ...