Difference among Polymers, Ceramics and Composites Quiz

How should Sarah classify these materials?

• Natural rubber as a synthetic polymer and nylon as a natural polymer
• Both as synthetic polymers
• Natural rubber as a natural polymer and nylon as a synthetic polymer
• Both as natural polymers

Answer explanation

Natural rubber is classified as a natural polymer because it is obtained from natural sources like rubber trees, while nylon is a synthetic polymer produced through chemical processes.

Which type of plastic should James choose?

• Thermoset plastic because it can be reshaped easily
• Thermoplastic because it can be reshaped multiple times upon heating
• Thermoset plastic because it becomes soft upon heating
• Thermoplastic because it cannot be reshaped once set

Answer explanation

Thermoplastics can be reshaped multiple times when heated, which makes them suitable for applications where reshaping is necessary.

What type of polymer is the student likely observing?

• Thermoplastic polymer
• Cross-linked polymer
• Branched polymer
• Linear polymer

Answer explanation

Cross-linked polymers become hard and brittle upon heating because the links between polymer chains restrict movement, resulting in a rigid structure.

How would you correct this misconception?

• Natural fibers absorb water and are less resistant to environmental factors compared to synthetic fibers.
• Synthetic fibers are more environmentally friendly because they degrade quickly.
• Natural fibers are more durable and resistant to acidity than synthetic fibers.
• Both fibers are equally resistant to environmental factors.

Answer explanation

Natural fibers like cotton absorb water and are less resistant to environmental factors, while synthetic fibers are designed to be more durable and resistant to moisture, acidity, and other environmental factors.

Which material should the manufacturer choose?

• Natural rubber for better chemical resistance
• Synthetic rubber for better elasticity and resilience
• Natural rubber because it is more elastic and resilient
• Synthetic rubber because it is more chemically resistant and durable

Answer explanation

Synthetic rubber is often more resistant to chemicals and can be engineered to have specific properties, making it more suitable for medical gloves that require durability and chemical resistance.

What type of polymer structure are the students most likely describing?

• Branched polymer
• Cross-linked polymer
• Linear polymer
• Thermoset polymer

Answer explanation

Linear polymers have long, straight chains that can be easily stretched, which makes them ideal for producing fibers.

Which combination of materials should the scientist consider for the composite?

• Natural fibers with a ceramic matrix
• Synthetic fibers with a rubber matrix
• Synthetic fibers with a resin matrix
• Natural fibers with a metal matrix

Answer explanation

Synthetic fibers combined with a resin matrix create a strong, lightweight composite, suitable for construction purposes.

Which polymer type should the student use?

• Thermoplastic, because it can be melted and reshaped for recycling
• Thermoset, because it can be broken down into smaller pieces for recycling
• Thermoplastic, because it becomes rigid after setting
• Thermoset, because it can be remolded after heating

Answer explanation

Thermoplastic polymers can be melted down and reshaped, making them suitable for recyclable packaging materials.

What type of fiber should be used?

• Natural fiber like cotton
• Semi-synthetic fiber like rayon
• Synthetic fiber like nylon
• Natural fiber like silk

Answer explanation

Synthetic fibers like nylon are resistant to mildew, microorganisms, and harsh weather conditions, making them suitable for outdoor furniture.

What is the substance added during vulcanization?

• Ammonia
• Sulfur
• Acids
• Alkalis

Answer explanation

Vulcanization is a process that adds sulfur to rubber to create cross-links between polymer chains, making the rubber more elastic, resilient, and durable.