Question

What is a thermoplastic polymer? Thermoplastics are polymers that can be softened by heat and pressure and then remolded. Thermoplastics are polymers that cannot be melted and remolded. Submit Request Answer Part B What is a good example of a thermoplastic? O Polyester O Polyurethanes Epoxy resin Polyethylene Submit Request Answer

Answer 1

part A

Thermoplastic polymers are those which becomes soft on heating and hard on being cooled. These types of polymers can be remolded into variety of shapes by the action of heat and pressure. There is no interlocking of chains occur in this type and hence this made it different from the thermosetting polymers.

Thermosetting polymers are those which when moulded in any shape can't be remolded again by action of heating and pressure because of the formation of the interlocking between the chains which prevent its remolding.

Hence correct option is (a) thermoplastic are polymers which can be softened by heat and pressure and can be remolded.

part B

Polyester is the thermoplastic polymer made up of the ester as a monomer. There are many applications of the polyester.

polyurethane is also a thermoplastic polymer. Compared to polyester the properties have certain restrictions and comparatively less applications.

epoxy resins are thermosetting polymers.

polyethylene is a thermoplastic polymers but it becomes thermosetting polymer when modified due to possible cross-linking between the polyethylene chains.

Hence, option (a) polyester is correct option.