A solvent is a substance, usually a liquid, that dissolves another substance (solute) to form a solution. In polymer chemistry, solvents are used to dissolve monomers, polymers, and initiators, facilitating polymerization reactions and polymer processing. The choice of solvent can affect the solubility, viscosity, and reactivity of the components in the polymerization system.

溶剂是一种物质，通常是液体，它溶解另一种物质（溶质）形成溶液。在高分子化学中，溶剂用于溶解单体、聚合物和引发剂，促进聚合反应和聚合物加工。溶剂的选择会影响聚合体系中各组分的溶解度、粘度和反应性。