What Is Thermosetting and Thermosoftening Polymers

The video tutorial explains the differences between thermosoftening and thermosetting polymers. Thermosoftening polymers, like polyethylene, soften when heated and can be molded into various shapes due to weak intermolecular forces. In contrast, thermosetting polymers, such as vulcanized rubber, have crosslinks that make them hard and resistant to heat. The video also discusses the applications and properties of these polymers, emphasizing their response to heat and structural differences.

What are the main factors that influence the properties of polymers?

• Monomer units, linkages, and forces

• Color and texture

• Temperature and pressure

• Size and weight

Which of the following is a characteristic of thermosoftening polymers?

• They soften and can be molded when heated

• They are cross-linked

• They harden when heated

• They have high melting points

Which of these is NOT an example of a thermosoftening polymer?

• Polyvinyl chloride

• Vulcanized rubber

• Polypropylene

• Polyethylene

What process is used to strengthen rubber for use in tires?

• Vulcanization

• Polymerization

• Distillation

• Crystallization

How do thermosetting polymers differ from thermosoftening polymers in terms of heat response?

• They soften and can be reshaped

• They melt at lower temperatures

• They remain hard and do not soften

• They become liquid when heated