This study describes the hydrolysis of glass fiber reinforced unsaturated polyester (UP) composites using some of the most employed and efficient additives from the literature. This includes the use of KOH, a mix of KOH/phenol and reference experiments without additives. Sub-critical water in a temperature range of 200–325 °C and a constant pressure of 300 bar were chosen as process parameters to cover a wide temperature range.

It was possible to explain the mechanisms producing the majority of the different reaction products identified by GC-MS. The monomer phthalic anhydride was only recovered in the experiments without additives and was most stable at 200–250 °C. The increase or decrease in the production of monomers and other reaction products at different temperatures with and without additives has been clarified by the GC-MS investigations, which introduces new possibilities for tailoring the production of monomers and various chemical compounds via hydrolysis of polymer composites.

这项研究描述了使用文献中一些最常用和最有效的添加剂水解玻璃纤维增​​强不饱和聚酯（UP）复合材料的方法。这包括使用KOH，KOH /苯酚的混合物以及不含添加剂的参考实验。选择200-325°C温度范围和300 bar恒定压力的亚临界水作为工艺参数，以覆盖较宽的温度范围。

可以解释产生由GC-MS鉴定的大多数不同反应产物的机理。仅在没有添加剂的实验中回收了单体邻苯二甲酸酐，并且在200–250°C下最稳定。GC-MS研究已经阐明了在有或没有添加剂的情况下，在不同温度下单体和其他反应产物产量的增加或减少，这为通过聚合物复合材料的水解量身定制单体和各种化合物的生产提供了新的可能性。