There are two types of plastic: thermosetting and thermoplastic.
Thermosetting plastics, such as Bakelite, use resins that are baked into their final form, usually in a mould. The chemical reaction of baking changes the resin so that it can no longer become fluid if reheated. These plastics cannot be "remolded", only powdered and put to other uses.
Thermoplatics (the bulk of plastic materials) use resins that are not baked in their moulds. Thermoplastics are heated until they flow, then cast into shape. Because they are only heated to flow temperature, no chemical reaction of heating occurs, and they can be re-moulded in a recycling process.
p.s. Bakelite is named for its inventor, Baekland, not because of its processing. True Bakelite is dark brown to black, so light-coloured "hard plastic" radio cabinets are *not* Bakelite - they are commonly Catalin, urea formaldehyde, or some other resin.
Thermosetting plastics are condensation polymers of two different types of monomers as Bakelite plastic is the polymer of Phenol and formaldehyde, on melting such polymer become decomposed into smaller molecules and are unable for remoulding.
Thermo plastics will soften when heated and can be reshaped.
Thermo-setting plastics undergo a chemical change when heated and will then retain their shape even when re-heated.
Bond b/w the chains are too strong so they do not break and hence they can not be remoulded.
More flexible than thermosetting plastics: they can undergo both elastic and plastic deformation without too much trouble. They can also be reformed and remoulded when reheated however they cannot withstand temperatures as high as thermosetting plastics.
Thermosetting plastics
thermoplastics and thermosetting plastics thermoplastics go soft when exposed to heat thermosetting plastics set (harden) when exposed to heat only thermoplastics are recyclable
They used as insulators, and body of vehicles, home appliances etc.
A wellknown example is bakelite.
Thermosetting, these plastics are rigid, resistant to higher temperatures compared with thermoplastics and once set, a thermosetting plastic cannot be remoulded.
More flexible than thermosetting plastics: they can undergo both elastic and plastic deformation without too much trouble. They can also be reformed and remoulded when reheated however they cannot withstand temperatures as high as thermosetting plastics.
yes. it is a thermoplastic. it can be remoulded.
If it has the recycled number on the bottom (probably code 2 HDPE) it is definately thermoplastic. One characterisitics of thermoplastics is that they can melt and be remoulded whereas thermosetting plastics can not (they will char). Therefore, it logically follows that if it can be recycled it will be a thermoplastic polymer.
yes wire coating is an example of thermosetting plastics!!!!
the opposite to thermosetting plastic is thermoplastic
Plastics which once moulded into a shape do not become soft on heating and cannot be moulded again are called thermosetting plastics.
thermoplastic plastics (recyclable)thermosetting plastics (non-recyclable)
mostly thermosetting plastics like bakelite
Thermosetting plastics. Once cooled and hardened, these plastics retain their shapes and cannot return to their original form. Thermosetting plastics dont melt (i think) :)
Thermosetting plastics
Thermoplastics are the only ones that can be recycled. Thermosets cannot be recycled.