Question 1:
Which property of polymers allows them to be flexible and easily molded into various shapes?
Explanation: The property of polymers that allows them to be flexible and easily molded into various shapes is high ductility. Ductility refers to the ability of a material to undergo plastic deformation without fracturing. Polymers with high ductility can be stretched and shaped without breaking.
Question 2:
Which type of polymer has a three-dimensional network structure and exhibits hardness, rigidity, and high heat resistance?
Explanation: Thermosetting polymers have a three-dimensional network structure that is formed through irreversible chemical crosslinking. They exhibit hardness, rigidity, and high heat resistance due to their strong and inflexible network of covalent bonds. Examples of thermosetting polymers include epoxy resins and phenolic resins.
Question 3:
Which type of polymer exhibits both elastic and viscous behavior and is commonly used in applications requiring flexibility and resilience?
Explanation: Elastomers exhibit both elastic and viscous behavior. They can be stretched and return to their original shape upon release of the applied stress, similar to rubber. Elastomers are commonly used in applications requiring flexibility, resilience, and the ability to withstand repeated deformation, such as gaskets, seals, and tires.
Question 4:
Which property of polymers allows them to resist the flow of electric current and makes them suitable for electrical insulation?
Explanation: Polymers exhibit high electrical resistivity, which means they resist the flow of electric current. This property makes them suitable for electrical insulation, as they can prevent the leakage of electrical charge and minimize the risk of short circuits.
Question 5:
Which application of polymers utilizes their ability to form transparent, lightweight, and impact-resistant materials?
Explanation: The application that utilizes the ability of polymers to form transparent, lightweight, and impact-resistant materials is safety goggles. Polymers such as polycarbonate are commonly used in the production of safety goggles due to their excellent optical clarity, low density, and high impact resistance, providing protection for the eyes.