I was wondering what is blu-tack really made of as it can be so stretchable and compressable. What really are all the materials that make it up
216514
Blu-tack is some sort of sticky liquid that machinese squeeze out into slabs and they are cooled into the solid state. I am not really sure of the materials as I googled it but it was to no avail. However, I was told by the blu-tack website that blu-tack is squeezed into special shapes containers. And then they are cooled. Period.
595976
Actually, Ms. Dental Hygienist, "rubber dams" are almost always made out of latex.\n\nI'm wondering if you thought that condoms were made out of rubber as well, since they are often called "rubbers".
85970
The authentic source would be sheepskin or calfskin, pressed out very thin and preserved much like leather is preserved.\n\nIt's recyclable, more or less.\n\nThe other kind of vellum is also called "tracing paper" and it is made from cotton and is recycleable.
184071
vulcanised rubber is made by heating the rubber with sulphur.(by Charles Goodyear-1838)\nproperties:even in very high temperatures,it will not loose its elasticity, when the force is taken away it resumes its usual shape, the increased ability to carry weight, doesn't corrode easily.\neg:tyres & tubes, corks, rubber pipes, raincoats, slippers\nhope that helped-cheers!
526575
they must be flexible and biocompatable. if it's in a knee, it has to be wear-resistant and fairly frictionless. if in a heart, it has to be pressure-resistant (as an artery)...\n\noverall, it cannot deteriorate inside the body, and it has to be resiliant.
632065
I think it is vinyl or imitation leather, or latex rubber.
128486
I'll go out on a limb and suppose that you need some very simple projects that can demonstrate polymer properties to the layperson.\n\nPhysics:  \n\nIf you take a rubber band, an elastomer, suspend a weight from it, and gently heat the rubber band with something like a hair drier, you can demonstrate that polymer chains prefer to adopt a random coil configuration rather than a straight, linear configuration. (I'll leave out the basic thermodynamic details so you can delve deeper into the subject.)\n\n\nChemistry:\n\nTo demonstrate the differences in size between polymers and small molecules, look up the size of a single water molecule and then get a piece of foam rubber.  The water molecule's size is on the order of Angstroms, while the foam rubber is essentially one gigantic molecule.\n\nIf you have access to sebacoyl chloride and hexamethylene diamine, you can make Nylon-6 by using equal parts of both reactants.  The polymer forms at the interface of the two liquids, and you can use tweezers to pull the polymer out of the reaction vessel.  NOTE:  Proper safety precautions MUST be followed as both chemicals are irritants. \n\nI've left out sources and a lot of other details so you can research the physics/chemistry of the examples given here.
197428
It Depends on what gains more importance,\n1) If you what it to be rigid & give a good look then ABS will be good,\n2) If you want it to be soft than PP (Polyproplene) is good,\n3) If you what it to be heat resistant & high stength then Bakalite (Thermoset plastic) will be good
104104
Wow, thats a tuff one. Have you considered cardboard or wire and fabric? How much time do you have because this seems like a time consuming task. You could look on the internet fo ideas that might help you out. It depends on what you want it to look like.
600098
http://thefifthrule.com/T5R/?p=225\n\nhttp://www.myscienceproject.org/gelatin.html\n\nhttp://how2dostuff.blogspot.com/2006/01/how-to-make-ballistics-gel.html\n\netc, etc
207614
How thick do you want the layer? when you find out, are you going to do it?\nNO??????\nSo, why are you asking??????
102922
Actually this is turning into a real mess. It turns out two or three years minimum and six to eight max is the life expectency of DVD's. Now they are saying if you want a stable long lasting backup you should use tape. Go figure, there are going to be a lot of people losing their pictures & data in a few years. Pressed DVD's last longer it is the "burned" ones that fail early. (Like the ones you make in your computer).\n\nI think all this publicity may encourage development of more stable CD's and DVD's.\n\nI have not read anything on life of the blu-ray. That might be better.
342747
My guess would be Duraluminium (an Aluminum alloy) orsome sort of titanium alloy... \n\nDuraluminium is used in harddisks as the ring separating the platters and in expensive bikes.
94636
I'm sorry I don't know what it is made of, but I know it is expensive and there is not really a huge difference between it and the other similar products offered that I have tried. If you are going to get him something try to find the odor-repellent kind that is made durable. ( Many of the things sold are of great material but not put together well and most synthetic fibers retain odors so that they can only be worn once before stinking to high heaven.)\nColumbia has some good products.
100860
Most sites just say "ink".  But this is the closest I came to finding out what it is made of:\n\nThe ink is almost pure melanin and does not dilute in sea water. The ink is contained in an organ called the ink sac which is located near the rectum and is unique to cephalopods.\n\nWell, I did not find an exact answer, but I sure learned more about squids and octipus then I ever needed to know.
377157
I'm not positive, but I think it's vinyl. Or wax. but i really have NO idea.
504311
plastic pvc plastic with thousands of little rubber bands wrapped around a little ball with water in it thats the core . throw one in the fire and stand back. its pretty cool