Final answer:
Certain components in improperly polymerized composites, such as epoxy, can cause allergic reactions in individuals.
Step-by-step explanation:
A properly polymerized composite is typically safe, but if not properly polymerized, certain components in the composite can cause allergic reactions in individuals. One example is the use of epoxy as a polymer matrix material. Epoxy is a commonly used polymer in composites and is known to cause allergic reactions in some people when exposed to it. These reactions can range from mild skin irritation to more severe symptoms such as difficulty breathing or anaphylaxis.
It is important to ensure that composites are properly polymerized and fully reacted to minimize the risk of allergic reactions. This can be achieved through proper curing and following manufacturer's instructions for polymerization. Additionally, individuals who are particularly sensitive or have a known allergy to certain polymers should take precautions to avoid exposure to these materials.