What is the name of the most common photoinitiator in composite materials?

The most common photoinitiator used in composite materials is camphorquinone. This compound is particularly favored in dental applications due to its effective ability to initiate polymerization upon exposure to blue light, typically in the wavelength range of 400-500 nm.

Camphorquinone works by generating free radicals when it absorbs light energy, which then initiates the polymerization process of the resin composite. This characteristic is crucial for ensuring that the composite material sets properly and achieves the desired mechanical properties, such as strength and durability, that are essential in dental restorations.

Other photoinitiators listed, while used in specific applications, are less common in dental composites. Benzoin methyl ether is known for its use in different types of polymer systems but does not match the widespread application of camphorquinone in dentistry. Similarly, Esacure KIP 150 and Lucirin TPO are utilized in various industrial photopolymerization processes but are not as prevalent in the context of dental composites as camphorquinone. Thus, camphorquinone stands out as the most recognized and utilized photoinitiator in this field.