This paper analyses the effect of curing kinetics on the mechanical properties of composites manufactured by out of die ultraviolet (UV) cured pultrusion. Curing kinetics have been modified using two combinations of depth curing (BAPO) and surface curing (α aminoketone) photoinitiators. The rate constant of the autocatalytic model k, shows that the curing kinetics of the formulation with the higher content of BAPO and lower content of α aminoketone is faster in the studied intensity range. Spectrometry results justify the differences in curing kinetics, since the light transmission through thickness is higher during the whole UV curing process due to photobleaching effect of BAPO. Faster UV curing kinetics generates lower expansion at the exit of the pultrusion die, reducing the void content approximately 90%. Consequently, flexural and interlaminar shear strength, as well as specific energy absorption index of the fast curing resin, are higher.

本文分析了固化动力学对通过模外紫外线（UV）固化拉挤成型制造的复合材料的机械性能的影响。使用深度固化（BAPO）和表面固化（α氨基酮）光引发剂的两种组合可以改变固化动力学。自催化模型k的速率常数，表明在所研究的强度范围内，具有较高BAPO含量和较低α-氨基酮含量的配方的固化动力学更快。光谱分析结果证明了固化动力学的差异，因为由于BAPO的光漂白作用，在整个UV固化过程中，穿过厚度的透光率更高。更快的紫外线固化动力学在拉挤模具的出口处产生较低的膨胀，从而将空隙含量降低约90％。因此，快速固化树脂的弯曲和层间剪切强度以及比能量吸收指数更高。