Difference between thermoplastic and thermosetting plastic

The basic difference between thermoplastic and thermosetting plastic depends on the behavior of the material at elevated temperatures.

Thermoplastic materials melt at elevated temperature and can be reformed into a new shape. While thermosetting plastic material melts during the first heating to form a permanent set and after that, it cannot melt and reform.  

Difference between thermoplastic and thermosetting plastic:

S.N.ThermoplasticsThermosetting plastic
1It can be reshaped again and again.This plastic can not be reshaped.
2Thermoplastics can melt again and again. It has low melting point.It can’t melt after it permanently gets set.
3Thermoplastics are flexible.Thermosetting plastic are brittle.
4Thermoplastics have lower tensile strength.It has higher tensile strength.
5Thermoplastics are softer.This plastic material is harder.
6Thermoplastic products have higher surface finish.It is difficult to obtain a surface finish in the case of thermosetting plastic.
7The plasticity increases with an increase in temperature.Plasticity does not change with a change in temperature.
8It is formed by addition polymerization.It is formed by condensation polymerization.
9There is no chemical change in thermoplastics while heating.Thermosetting plastic undergoes chemical change while first heating to form a permanent set.
10Thermoplastics are used in injection molding, blow molding.Thermosetting plastics are used in compression molding.
11It cannot be used for fireproof applications.It can be used for fireproof applications.
12Thermoplastics can be recycled.It cannot be recycled.
13Examples: Polyvinyl chloride, Nylon.Example: polyurethane.

Pratik is a Graduated Mechanical engineer. He enjoys sharing the engineering knowledge learned by him with people.

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