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Chapter 12: Problem 94

Indicate whether each statement is true or false: (a) Elastomers are rubbery solids. (b) Thermosets cannot be reshaped. (c) Thermoplastic polymers can be recycled.

Short Answer

Expert verified
(a) True: Elastomers are rubbery solids due to their viscoelastic properties. (b) True: Thermosets cannot be reshaped because their curing process is irreversible. (c) True: Thermoplastic polymers can be recycled as they can be reheated and reshaped multiple times without affecting their original physical properties.

Step by step solution

01

(a) Elastomers are rubbery solids.

Elastomers are a type of polymer with viscoelasticity, which means they have both viscosity and elasticity properties. They can return to their original shape after being deformed, giving them their "rubbery" behavior. Therefore, this statement is True.
02

(b) Thermosets cannot be reshaped.

Thermosets are a type of polymer that undergoes a curing process with heat or other means to create a set, rigid structure. This process is irreversible, and once the thermoset is cured, it cannot be melted and reshaped like some other polymers. Therefore, this statement is True.
03

(c) Thermoplastic polymers can be recycled.

Thermoplastic polymers are a type of polymer that can be reheated and reshaped multiple times without affecting their original physical properties. This makes them suitable for recycling, as they can be melted down and remolded into new products. Therefore, this statement is True.

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