What is a characteristic of acrylic plastics?

Acrylic plastics, also known as polymethyl methacrylate (PMMA), are known for their chemical resistance, particularly against substances like zinc chloride. This characteristic makes them suitable for a variety of applications, especially in environments where they might be exposed to certain chemicals.

While acrylic does have some vulnerabilities to certain solvents, zinc chloride does not significantly affect acrylic plastics. This quality is crucial because it allows the material to be used in settings where exposure to this chemical is possible without risking degradation or failure of the material.

The other choices highlight properties that are not reflective of acrylic’s behaviors. For instance, while acrylic can become more brittle in colder temperatures, it is not a defining characteristic as in some other materials. Similarly, while acrylic plastics do dissolve in acetone, this is not as relevant when discussing their resistance. Therefore, identifying that zinc chloride will have no effect on them accurately reflects the chemical resilience characteristic of acrylic plastics.