Thermosets and ThermoplasticsThermosetting polymers, also known as thermosets, solidify into a permanent shape. They are amorphous and considered to have infinite molecular weight. Thermoplastics, on the other hand, can be heated and remolded over and over again. Some thermoplastics are amorphous, while some have a partially crystalline structure. Thermoplastics typically have a molecular weight between 20,000 to 500,000 amu.
Examples of Plasticspolyethylene terephthalate - PET or PETE
high-density polyethylene - HDPE
polyvinyl chloride - PVC
polypropylene - PP
polystyrene - PS
low-density polyethylene - LDPE