Leben
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Ideas for polymers that become solvent resistant after polymerization?
I've been doing some hobby research into material science and polymer blends. I've been researching trying to find some polymer blends that are
soluble in a solvent such as acetone, until they begin to polymerize and at which point become insoluble and chemically stable. Ideal method of
initiation would be photointiation. The photoinitiator is easy to get a hold of, so I am more concerned with the polymer blend itself.
http://en.wikipedia.org/wiki/Polymer_blend
Found some here, but there is little mention of post polymerization solvent resistance. The most ideal blend would be something that is relatively
unreactive once polymerized.
Does anyone have experience with this sort of thing?
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Etaoin Shrdlu
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What do you intend to use it for? Thin coatings? Any other requirements beyond solvent reiststance? Epoxy phenol novolac resins are the first thing
that comes to mind. http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_0030/...
They can be photoinitiated to self-crosslink instead of requiring a "hardener."
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Leben
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I was planning to create catalytically active solid surfaces. I thought of the idea the other day and turns out its already been heavily tried and
researched. For example, coating a stir bar with a platinum, nickel, or some coordination complex doped polymer, so that it can be used in reactions
without polluting the reaction mixture. Easy removal of catalyst, easy reuse of catalyst, and more. The potential uses for this sort of application
are almost endless.
I am inclined to think that any polymer with multiple polymerizable functional groups could work, because 3D polymerization should take place, as
opposed to something like polystyrene where the polymerization is linear.
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Etaoin Shrdlu
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Oh, yes! Usually the practice is to embed nanoparticles in macroporous resin, or fix the metal onto an ion-exchange resin. http://membrane.ustc.edu.cn/paper/pdf/Ion%20Exchange%20Resin...
For resin-based catalysts it tends to be polystyrene/divinylbenzene modified with other monomers for additional functional groups. There's no reason I
can think of that others shouldn't work, though. I think Dow has the broadest line of ion-exchange resins right now, and also sells raw monomers for
synthesizing them. Maybe a good place to get ideas.
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Leben
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I thought Ion Exchange Resins were used for electrochemistry? Does seem like we are talking about the same thing though. I'm more interested in
learning to make my own polymers and coatings on various materials. Building the polymer blends from the base compounds.
I have an ultrasonic transducer which I have used to make colloidal nanopartical suspensions. Most resins cannot be sonified without polymerization
happening, but I think if I mix the premade nano-suspension with the resin thoroughly and then apply the coating I should be good to go
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unionised
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Am I missing something?
Styrene to polystyrene in alcohol.
The monomer is soluble: the polymer isn't.
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Leben
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I forgot what page I was looking at, but Divinylbenzene + Styrene + a photointiator seems to be a reliable polymer blend that will form a chemically
resistant polymer when activated. Divnylbenzene behaves as a crosslinking agent.
Unless I'm mistaken, isn't Styrofoam polystyrene? Isn't styrene the monomer and polystyrene the polymer? Styrene is a liquid, polystyrene a solid.
Styrofoam easily dissolves in solvents like acetone.
[Edited on 16-11-2014 by Leben]
[Edited on 16-11-2014 by Leben]
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Etaoin Shrdlu
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Quote: Originally posted by Leben  | | I forgot what page I was looking at, but Divinylbenzene + Styrene + a photointiator seems to be a reliable polymer blend that will form a chemically
resistant polymer when activated. Divnylbenzene behaves as a crosslinking agent. |
Yes, that's the typical base for ion-exchange resins.
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SimpleChemist-238
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It would be interesting to see a polymer that could produce electric current like piezo crystals. You could cote walls and floors with the material
to make electricity from foot traffic and dust storms.
We are chemists , we bring light to the darkness. Knowledge to ignorant, excitement to the depressed and unknowing. we bring crops to broken fields
and water to the desert. Where there is fear we bring curiosity.
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unionised
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| Quote: Originally posted by Leben | I forgot what page I was looking at, but Divinylbenzene + Styrene + a photointiator seems to be a reliable polymer blend that will form a chemically
resistant polymer when activated. Divnylbenzene behaves as a crosslinking agent.
Unless I'm mistaken, isn't Styrofoam polystyrene? Isn't styrene the monomer and polystyrene the polymer? Styrene is a liquid, polystyrene a solid.
Styrofoam easily dissolves in solvents like acetone.
[Edited on 16-11-2014 by Leben]
[Edited on 16-11-2014 by Leben] |
Did you not notice that I said alcohol rather than acetone (which softens, but doesn't really dissolve polystyrene)?
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Etaoin Shrdlu
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Leben was looking for solvent-resistant, chemically stable polymers, not ethanol-resistant polymers.
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