Polymer Properties and Applications

What is the fundamental structure of a polymer?

• A single, large molecule.

• A mixture of different types of metals.

• Long repeating chains of tiny molecules called monomers.

• A type of ceramic material.

Which statement accurately describes the relationship between polymer structure and its properties?

• Polymers with shorter chains tend to be stiffer.

• Polymers with longer chains tend to show more elastic properties.

• Polymers with smaller monomers are generally stronger.

• Polymers with simpler monomers are always more ductile.

What is the process called when polymer chains are bonded together to form a 3D net-like structure, increasing their stiffness?

• Polymerization

• Monomerization

• Cross-linking

• Elastomerization

What was a significant problem with billiard balls made from celluloid in the 1870s?

• They were too heavy and damaged the tables.

• They were highly flammable and could explode upon impact.

• They quickly dissolved in water.

• They were too soft and easily deformed.

What was Hermann Staudinger's significant contribution to the field of chemistry?

• He discovered a new element.

• He proposed that polymers are made of large molecules arranged in long molecular chains.

• He invented the first synthetic rubber.

• He developed a method to make fabrics less flammable.

How did polymers contribute to the Allied forces' strategy during World War II?

• They were used to create more powerful explosives.

• They were used to build faster military vehicles.

• They were used to create inflatable decoy tanks, part of the "Ghost Army".

• They were used to develop advanced communication systems.

Which of the following is a primary use for polyethylene (PE)?

• Building pipes and window frames.

• Bulletproof vests.

• Packaging materials like plastic bags and bottles.

• Non-stick coatings for cookware.

What is the effect of adding a small concentration of a polymer to a moving fluid, a phenomenon known as polymeric drag reduction?

• It increases the fluid's viscosity, making it flow slower.

• It decreases friction within the fluid, allowing it to flow faster.

• It changes the fluid's color and transparency.

• It makes the fluid electrically conductive.