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∙ 14y agothermo settings is a machine which you can put plastics and other materials in to heat them and mold them in difrent ways , and after its done you cant re shape it or melt it again.
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Why are thermoplastics and thermosettings different?
there r differenrt cos they r
Is acrylic a themosetting?
Some acrylic resins are thermoplastic and other are thermosettings.
What are the two main plastics?
thermosettings and thermoplastics. A thermoplastic can be remelted and reused, a thermoset cannot.
What are thermosettings and therosoftening polymers?
Polymers are plastic. Thermosoftening is hard when it is cold and flexible when it is warm. Thermosetting is flexible when cold and hard when hotThermosetting plastics are polymers that, once heated, melted and moulded, cannot be re-moulded as the bond between their molecules are too strong. Thermosoftening plastics are polymers which can be re-moulded many times as the bonds between the molecules are very weak. Thermosetting plastics can only be shaped once. Thermosoftening plastics can be shaped and re-shaped many times. :) hope this is helpful x
Classification of conducting polymers?
polymers are classified into 5 types as follows: A))based on synthesis: 1)addition polymers 2)condensation polymers B))based on inter molecular forces: 1)fibers 2)elastromers 3)thermoplastics 4)thermosettings C))from source 1)natural polymers 2)synthetic polymers D))based on material 1)organic polymer 2)inorganic polymer E))based on structure 1)linear polymer 2)branched polymer 3)cross linked polymer F))based on the monomer 1)homo polymer 2)hetero polymer
What are thermoplastics and thermosettings polymers?
Thermoplastics can be melted into liquids using heat and then set again when they cool. This is often useful for recycling and such. Melt it down, make something else. Thermosetting polymers cannot be melted down in such a way and will generally just burn if you try to heat them too much. It's quite common for thermosetting polymers to start off as a liquid and then be "cured" to become hard...often using heat. Once they have been cured, they cannot be reverted back to a liquid. This sounds disadvantageous but thermosetting polymers are usually much tougher than thermoplastics, so you just pick the right one for the job. Like tyres, for example...you can't have them melting when they get hot, and they need to be tough so thermosetting polymers are a good idea. A final note about thermoplastics: if you lower the temperature (usually it has to be a lot - there's a really cool balloon + liquid nitrogen experiment you can do for this) they will become a sort of glass, but will revert back when warmed through. The two are very different in terms of packing. I'm sure there is some overlap but generally speaking, thermoplastics tend to polymerise in long chains that then pack together. Thermosetting polymers take on a more permanent 3D structure. There's a lot to say about them, but those are some major bullet points. Search google for further reading, or ask a more specific question if one is needed.
What is the difference between thermo plastic and thermosetting plastic?
Answerthermoplastics plastics can be heated and then moulded into a shape or form, but thermosetting cannot.Each plastic can be moulded into a 'shape or form', it is just that thermoplastics, once they have been moulded, they can be re-heated and moulded again, where-as once thermosetting plastics have been moulded, if re-heated and you try to remould it, it will just make it brittle and snap instead.
What are plastic and how are they classified?
a. Visually examine the sample, looking for recycle codes b. Try assessing the flexibility by bending, and look at the bending zone - does the material stretch or is it brittle? c. Test the hardness, try scratching it with pencils of differing hardness ( B,HB,1-6H ) to ascertain which causes a scratch in the plastic. Alternatively, attempt to scuff the sample with a fingernail. d. Cut a small slither with a sharp knife. Does the sample cut cleanly ( thermoplastic )?, or does it crumble ( thermosetting )? e. Hold sample in small flame, note whether it burns, self-extinguishes on removal from the flame, colour of the flame, and smell/acrid nature of fumes when flame is blown out ( Caution - the fumes are likely to be toxic ). Also attempt to press melted sample against a cold surface, and pull away - does sample easily form long threads. f. Drop onto a hard surface, does the sample "ring" or "thud"? g. Place it in water. Does it float, sink slowly, or sink rapidly? If it sinks rapidly, it is likely to be halogenated ( PVC, Viton, PTFE ) If it sinks slowly, possibly nylon If it floats possibly polyethylene or polypropylene.
