Plastic and rubber are both polymers.
Plastics are subdivided into two types: thermoplastic and thermoset.
Get a thermoplastic hot enough and it will melt. Common thermoplastics include nylon and polyethylene. Melting temp for the various types vary a lot.
Thermosets may char or burn but will never melt. Common types are phenolics and epoxies.
All types of rubber are thermosets.
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After all is said and done, successful rifle shooting on the range is nothing more than first finding a rifle and lot of ammunition which will do precisely the same thing shot after shot, and then developing the same skill in the rifleman.” ~ Capt. E.C. Crossman (The Book of the Springfield)
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