Can rubber (as used as a backing for a frame) spontaneously melt?
111897
Is it true rubber? Most so called rubber products have no rubber in them. Rubber is expensive. In answer to your question it will only melt if the flashpoint of the material is met. This would only occur in a fire.
98850
Yes. It will superheat and have a violent reaction when something touches it.
58274
Be careful with the superglue!
450932
You can of course try anything you wish.  However, I would suggest that you perform (or have performed) a flame test on any sample product.  I recall that the UL (Underwriters Lab) was involved in a law suit re' testing of new styrofoam panels for insulation.  The panels were used to insulate a garage and were not covered.  When a fire broke out the panels became a holocaust (causing a death).  The panels evidently passed a flame test when horizontal igniting slowly and were not tested vertically which would have shown that they were a hazard and needed to be covered to resist flame and burn rate.  You could check your panels against fibreboard (horizontally and vertically) to check for gross problems.  Also have a Lab perform formal tests before going commercial.  I would think the binder and surface texture would be very important.  good luck.
751064
Yes, keep them as cool as possible, but WITHOUT freezing them.\nAcrylate (and methacrylate) monomers are very reactive, polymerize readily...come with a minor amount of inhibitor to retard this reaction under normal conditions, but the inhibition is overcome with heat.\nThis polymerization is exothermic...a great deal of heat is given off...so much so that a one-gallon jug can EXPLODE in the runaway reaction.\nPlease handle (and store) monomers safely...consult the manufacturer's instruction sheet.
1139330
Hi\nThe most damping rubber material I know is acrylate caoutchouc. It is also temperatur resistant up to 130°C. CR (chlorine butadiene caoutchouc) is also pretty good in damping. An alternative material is PU foam. The right material for you depends on the application.
1157898
No polymer can withstand this level of temperature. However, if you can sheild and cool the rope to around 120 degrees C then a ploymer could be used. Fire resistane containors uses this method, but only last for about 1 hour. I would recommend looking at the metal manufacturing industries. The only material that I know that can withstand tis level of tempature are nickle based super alloys which are used in Jet engines at around 850C.\nHowever, you could use steel that is cooled and shelded and this might last the length of the fire.
306923
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.
217896
rubbers dont protect from all diseases,
450309
you mean like silicone?\nor earthquakes?
236052
gorilla glue! \nor possibly rubber cemente
1059446
Thermoplastic will melt, and can be remolded\nThermoset will NOT melt once molded. This is what you see plastic ashtrays made of to withstand the heat of a cigarette.\n\nEasy Wikipedia search\n\nhttp://en.wikipedia.org/wiki/Thermoplastic\nFrom Wikipedia, the free encyclopedia\n\nA thermoplastic is a material that is plastic or deformable, melts to a liquid when heated and freezes to a brittle, glassy state when cooled sufficiently. Most thermoplastics are high molecular weight polymers whose chains associate through weak van der Waals forces (polyethylene); stronger dipole-dipole interactions and hydrogen bonding (nylon); or even stacking of aromatic rings (polystyrene). Thermoplastic polymers differ from thermosetting polymers (Bakelite; vulcanized rubber) which once formed and cured, can never be remelted and remolded. Many thermoplastic materials are addition polymers; e.g., vinyl chain-growth polymers such as polyethylene and polypropylene\n\n===== ===== ===== ===== ===== ===== ===== \n\nhttp://en.wikipedia.org/wiki/Zylon\nZylon\nFrom Wikipedia, the free encyclopedia\n\nZylon is a trademarked name for a range of thermoset polyurethane materials manufactured by the Toyobo Corporation. These are members of the synthetic polymer family of materials.\n\nIUPAC name: poly(p-phenylene-2,6-benzobisoxazole)\n\nThe particular subset that Zylon is derived from are the EBXL-TPU plastics. (From electron beam cross-linked ThermoPlastic Polyurethane).\n\nVaguely related to Kevlar and nylon, Zylon is used in a number of applications that require very high strength with excellent thermal stability. Tennis racquets, Table Tennis blades, various medical applications, and some of the martian rovers are some of the more well known instances.
322744
cross-linking affects all polymers in the same way.  they will become more rigid, less soluble and thermally more stable.
446544
many times my use of epoxy i have seen where the epoxy will hold like mad, but the surrounding material will fail.\n\nso if you think epoxy will keep brick or wood from breaking in a quake i dont think it will....\n\ngorilla glue a uric type of epoxy is just nasty stuff to work with....clean up is hell...dont get it on you...
1171170
Were you using rubber cement?\nIf you were then try using a glue called Gorilla Glue instead and apply to that same type tire patch.\n\nThat stuff is strong.
1116582
no... they may crack and turn gray, but they will not melt
701285
In ideal conditions, yes.\n\nIn your error analysis, you could talk about how styrofoam calorimeters are not the best ones to use and some heat could have been lost to the environment.