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What is the structure of divinylbenzene cross-linked polystyrene solid support?
the styrene portion creates linear polymeric structures since styrene is monofunctional. The divinylbenzene is difunctional, so where it is indorporated in a styrene chain, there is one functional group left to react. When this happens in the making of another polystyrene chain, the result is a crosslinked structure. The proportion of divinylbenzene controls the amount of crosslinking. This translates into more or less porosity (allowed permeation in the final polymer) with less or more divinylbenzene.
What is HIPS plastic?
HIPS High Impact Polystyrene is particularly suitable for thermoforming, it is a tough, rigid material and its high impact strength means it can be guillotined, punched, routered or sawn without difficulty.
What is synthetic rubber?
It is rubber made by man. There are a number of types so I suggest you look at the related links. Styrene- Butadiene Rubber (SBR) is common but there are many others.
What kind of plastic are LEGO bricks made of?
Most regular LEGO bricks are made of Acrylonitrile Butadiene Styrene or ABS. ABS is a copolymer and very customizable. Although this plastic is sometimes not suitable to use so instead some may be made from Polycarbonate (transparent bricks).
How do you separate polystyrene beads from small ball bearings?
easy the ball bearings are heavier so give it a shake and they will fall to the bottom and the polystyrene will go to the top or you could also use a magnet
What is the true density of polystyrene?
Polystyrene is a common plastic that most of us encounter dozens of times a day in our travels, most often in packaging. The thing about polystyrene is that it has a number of forms (chemical structures). Consider this chemical formula:C6H5CH=CH2This is (monomer) styrene. If we link a bunch of these together, we end up with poly (many) styrene. Consider this chemical formula:(C8H8)nThis depicts the basic (monomer) styrene with the subscript n to denote that a number of different molecules can be made up. And if you guessed that these molecules have different densities, you'd be correct. In general, the density of polystyrene varies from about 1.06 to 1.12 g/cc, so there is no "true" or precise density for polystyrene.
Why is the glass transition temperature of polystyrene greater than of polypropylene?
Higher the glass transition temperature of the polystyrene can be attributed to the fact that sterically rigid bulky aromatic moieties like benzene in the styrene compared to that of aliphatic polypropylene
What is the structure of divinylbenzene cross-linked polystyrene solid support?
the styrene portion creates linear polymeric structures since styrene is monofunctional. The divinylbenzene is difunctional, so where it is indorporated in a styrene chain, there is one functional group left to react. When this happens in the making of another polystyrene chain, the result is a crosslinked structure. The proportion of divinylbenzene controls the amount of crosslinking. This translates into more or less porosity (allowed permeation in the final polymer) with less or more divinylbenzene.
Main ingredients of polystyrene?
It starts with steam cracking of oil or reforming of natural gas to get a compound called Ethylene (C2H4) which is the first precursor chemical neeeded. Benzene is also used and is extracted from crude oil by catalytic action on a particular fraction of the oil stream. Benzene and Ethylene are combined to make Ethylbenzene Ethylbenzene is mixed with hot steam on a catalytic bed to make Styrene Then an initiator like benzoyl peroxide (very similar chemical to the catalyst that you mix to make Bondo putty with) is mixed with the Styrene which starts a reaction which is called a free radical polymerization which basically puts all those light gas bubbles in the liquid styrene and also causes it to turn to a solid
What is HIPS plastic?
HIPS High Impact Polystyrene is particularly suitable for thermoforming, it is a tough, rigid material and its high impact strength means it can be guillotined, punched, routered or sawn without difficulty.
Why is polystyrene non polar?
AnswerIt is a paintable plastic. I only know because I make (buildings) and some of the windows are made from that. AnswerPolystyrene is a polymer made from monomer styrene, extracted as a liquid from petroleum. It is a thermo plastic which means it can be heated and cooled back to a solid Actually Styrofoam is a Dow Chemical registered trade mark for foam insulation and does not refer to all polystyrene so that term is misused. Polystyrene comes in small bead format and then is expanded into shapes like coffee cups, clam shell container at fast food outlets etc. There are also hard polystyrene products, like disposable cutlery, plastic containers like yogurt etc. electronic housing for TVs etc. It can come in clear form too.The white foam polystyrene can be painted with acrylic paint, but the second you use a solvent based paint on it, it will dissolve.
Can you paint polystyrene with super sheen acrylic?
Acrylic will adhere just fine to polystyrene but polystyrene dents and cracks relatively easy and so will your coating of acrylic. The acrylic will give the polystyrene a little more integrity but not much.
Is rubber synthetic?
It is rubber made by man. There are a number of types so I suggest you look at the related links. Styrene- Butadiene Rubber (SBR) is common but there are many others.
What is synthetic rubber?
It is rubber made by man. There are a number of types so I suggest you look at the related links. Styrene- Butadiene Rubber (SBR) is common but there are many others.
Where can one purchase polystyrene foam?
One can purchase polystyrene foam at many home improvement stores, such as Home Depot and Lowes. Polystyrene foam expands after it is applied, so it is a great gap filler in home improvement.
Is polystyrene recycleable?
polystyrene is a thermoplastic which means that it is a plastic that can be melted and molded into any shape. So basically, polystyrene is a plastic, though it can be molded when heated whereas normal plastics just melt in contact with heat.
Why was methanol an appropriate solvent to precipitate polystyrene?
Methanol is used to force polystyrene OUT of solution. So the simple answer is: you can't. But, there is probably an extreme temperature or pressure that allows polystyrene to remain in solution with methanol present.
