Which of the following is NOT a type of acrylic?

The correct answer is that polyethylenes are not a type of acrylic. Acrylics are a group of synthetic compounds that typically contain a vinyl functional group and are used in various applications, including nail enhancements.

Methacrylates and acrylates are both types of acrylic compounds. Methacrylates are derived from methacrylic acid, while acrylates are derived from acrylic acid; both play essential roles in the formulation of nail products due to their ability to form durable and flexible structures when cured.

Cyanoacrylates, while often associated with adhesives, are also a type of acrylic compound that polymerizes quickly and is commonly known for its use in nail applications, particularly for nail tips and repairs due to their fast curing process.

On the other hand, polyethylenes are a completely different class of polymers derived from the polymerization of ethylene and do not share the chemical characteristics or functional uses that define acrylics. They are primarily known for applications in packaging, containers, and insulation, rather than in nail enhancement products.