A single-stage peel method was employed to determine the relationship between key processing parameters and tack for a standard aerospace carbon/epoxy prepreg subjected to various levels of room-temperature out-time. The temperature-dependent viscoelasticity of the resin was studied using parallel plate rheometry and modelled using a simple Arrhenius equation. Differential scanning calorimetry and gel permeation chromatography results showed that, over a period of 35 days under ambient conditions, resin T_g increased, while no significant change in polymer chain length was observed. Time–temperature superposition was applied to construct tack master curves for each out–time interval, which were shown to approximately coincide when considering shift factors attributed to changes in T_g. Process maps considering prepreg out–time were generated using tack master curves to inform process parameters and achieve desirable tack levels. This type of tailored process control is anticipated to improve resource utilization when manufacturing large preforms which take several days to complete.

采用单阶段剥离方法来确定关键加工参数与标准胶粘剂之间的关系，该标准胶粘剂是用于标准航空碳/环氧预浸料，其经受各种水平的室温超时。使用平行板流变仪研究树脂的温度依赖性粘弹性，并使用简单的Arrhenius方程进行建模。差示扫描量热法和凝胶渗透色谱法结果表明，在环境条件下经过35天的时间，树脂T _g增加，而聚合物链长没有观察到显着变化。应用时间-温度叠加来构建每个输出时间间隔的粘性主曲线，当考虑归因于T变化的移位因子时，该曲线近似重合_摹。使用粘性主曲线生成考虑预浸料坯超时的工艺图，以告知工艺参数并达到理想的粘性水平。预计在生产需要数天才能完成的大型瓶坯时，这种量身定制的过程控制将提高资源利用率。