Epoxy resins are a highly versatile class of multifunctional reactive intermediates that are crosslinked into three-dimensional networks with curing agents or “hardeners” such as multifunctional amines, carboxylic acid anhydrides, and phenolic resins. When cured, the resulting thermoset materials are formed without the generation of volatile by-products. This results in void-free cured parts, which is particularly important in thick structures.