How to melt PLASTIC??????

Melting plastic at or slightly above its softening temperature should not affect the environment.

What kind of plastic is it ?

Melting when talking about plastics refers to the temperature exceeding its glass transition temperature and the breakdown of the crystalline layer within.If your polymer is 100% amorphous (thermosetting) then it wont have a melting point. It will just soften gradually until it starts to decompose.

In the lab, plastics are normally heated on a hotplate under a fumehood

you would have to collect the fumes somehow.

otherwise wouldn't worry about.

plus i don't think melting plastic is what harms the environment, its when you burn it that it does damage

melt it in a inert environment - but most will decompose

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