The major technical limitations in polymer recycling are their incompatibility between each other and their ageing. In this study, impact reinforced styrenics, namely HIPS and ABS, were evaluated in the scope of their alterations through recycling photooxidized material. In this purpose, plates were photodegraded in both natural and accelerated conditions. FTIR-ATR was used to monitor their ageing. After the desired ageing durations, plates were ground, extruded and injected into ISO1 dumbbell tensile test specimens to simulate recycling of degraded polymers. Strong interactions were observed between photooxidation and polymer processing through photometry measures, associated color changes, tensile and impact properties. It was noticed that unaged materials displayed only moderated alterations through recycling. Because of their close chemistry, HIPS and ABS share several modifications but ABS was less altered and mainly impact properties were affected. HIPS and ABS difference of sensibilities could be rooted in PB phases different morphologies and grafting between the two materials.

聚合物回收的主要技术限制是它们彼此之间的不相容性以及它们的老化。在这项研究中，通过回收光氧化材料，评估了冲击增强苯乙烯，即HIPS和ABS，其变化范围。为此，在自然和加速条件下对板进行光降解。FTIR-ATR用于监测他们的年龄。经过所需的老化时间后，将板研磨，挤出并注入ISO1哑铃拉伸测试样品中，以模拟降解聚合物的回收利用。通过光度测量，相关的颜色变化，拉伸和冲击性能，观察到了光氧化和聚合物加工之间的强相互作用。注意到未老化的材料仅通过回收显示出适度的变化。由于他们密切的化学反应，HIPS和ABS进行了一些修改，但ABS的更改较少，并且主要影响了冲击性能。HIPS和ABS敏感性的差异可能源于PB相的不同形态和两种材料之间的接枝。