Recently, the aerospace industry has been facing many challenges, including an increase in the production rates to meet the market needs. In the context of adhesives and liquid shim applications, this means the possibility of on-demand curing. In other words, adhesives must cure slowly at room temperature and this process must be accelerated at any time to allow for the fastest polymerization possible. However, while on-demand curing is possible in several ways (ultraviolet radiation, induction, or microwave), the route chosen in this study is infrared (IR) radiation. This is because this method allows curing at low temperatures (i.e., around 50°C) and is universal, hence requiring no modification in the adhesive formulation.

Given that the acceleration of polymerization using thermal (temperature) and nonthermal (radiation–matter interaction) effects has been demonstrated in another study, it is now important to study the properties of such an adhesive after curing under IR radiation.

In this study, we measured the following properties: adherence on aluminum 2024-T3 via three-point bending, tensile strength and modulus, and flexural strength and modulus. We also studied the parameters of the IR lamp, including the lamp–adhesive distance and the rate and temperature of polymerization. For this purpose, a composite design of experiments was used, which generally has two main advantages: screening and response surface methodology. On the one hand, screening allows determining the factors, among those selected, that have a significant influence on the studied responses. At the same time, it allows determining the interactions (synergistic effects) between the influencing parameters. On the other hand, response surface methodology allows quantifying the influence of the parameters and determining the optimal ones.

最近，航空航天工业面临着许多挑战，包括提高生产率以满足市场需求。在粘合剂和液体垫片应用的背景下，这意味着按需固化的可能性。换句话说，粘合剂必须在室温下缓慢固化，并且必须随时加速该过程以实现尽可能快的聚合。然而，虽然按需固化可以通过多种方式（紫外线辐射、感应或微波）实现，但本研究中选择的途径是红外 (IR) 辐射。这是因为该方法允许在低温（即大约 50°C）下固化并且是通用的，因此不需要修改粘合剂配方。

鉴于在另一项研究中已经证明了使用热（温度）和非热（辐射-物质相互作用）效应加速聚合，现在研究这种粘合剂在红外辐射下固化后的性质很重要。

在这项研究中，我们测量了以下特性：通过三点弯曲、拉伸强度和模量以及弯曲强度和模量对铝 2024-T3 的粘附。我们还研究了红外灯的参数，包括灯与粘合剂的距离以及聚合速率和温度。为此，使用了实验的复合设计，它通常具有两个主要优点：筛选和响应面方法。一方面，筛选允许在所选的因素中确定对研究的响应有重大影响的因素。同时，它允许确定影响参数之间的相互作用（协同效应）。另一方面，响应面方法允许量化参数的影响并确定最佳参数。