Here's why:
* Monomer (Liquid): The liquid monomer is what contains the activating ingredients, usually tertiary amines. These amines are the accelerators. They initiate and speed up the polymerization process when the liquid mixes with the powder.
* Polymer (Powder): The acrylic powder contains the polymer (polyethylmethacrylate or polymethylmethacrylate) and the initiator (benzoyl peroxide or BPO). The BPO requires an activator (the accelerator in the liquid) to start the polymerization process.
In essence, the accelerator in the liquid monomer reacts with the initiator (BPO) in the powder when they are combined. This reaction generates free radicals, which then link the monomer molecules together, forming long polymer chains, resulting in the hardened acrylic nail.