Unsaturated-polyester/glass-fiber composites are worldwide more and more used. Actually, their thermochemical and mechanical recycling paths are quite well-known. But, due to the relatively low value of the end products, these two paths are hardly economically viable. Thus, a third way will be proposed as a thermomechanical path. In order to recycle these composites, a study of their thermo-mechanical behaviors is proposed in this work, through various static and dynamic tests at temperatures ranging from ambient to 150 °C, over their glass-transition-temperature (T_g). As expected, the results prove that unsaturated-polyester reinforced by woven glass-fibers is more resistant in static flexion and traction than composite made with mixed chopped and woven glass-fibers, at ambient temperature and up to 150 °C. Also, static and dynamic tests have shown that composite manufactured by infusion is more resistant than the hand lay-up composite forming. Indeed, dynamic 3-points-flexural-bending test indicates that these composites lose their stiffness during the temperature rise. Furthermore, the composites ageing study shows the appearance of Mullins effect and hysteresis phenomena, at 150 °C. After an accelerated ageing in distilled water at ambient temperature, the composite lost about 66% of its flexural resistance but a gain of 195% in its deformation at break is obtained. For an ageing in distilled water at temperature around its T_g, this composite lost the same ratio in its flexural resistance but got 180% in its yield deformation, compared to its virgin state. The mechanical properties lose can be interpreted by the ester function hydrolysis and the glass fibers damage.

在世界范围内，不饱和聚酯/玻璃纤维复合材料的使用越来越多。实际上，它们的热化学和机械回收途径是众所周知的。但是，由于最终产品的价值相对较低，因此这两种途径在经济上几乎不可行。因此，将提出第三种方式作为热机械路径。为了回收这些复合材料，在这项工作中，通过在环境温度至150°C的温度范围内，在其玻璃化转变温度（T _g）范围内进行各种静态和动态测试，研究了它们的热机械行为。）。正如预期的那样，结果证明，在室温和最高150°C的温度下，由机织玻璃纤维增​​强的不饱和聚酯比由混合短切纤维和机织玻璃纤维制成的复合材料在静态弯曲和牵引方面更具抵抗力。同样，静态和动态测试表明，通过灌注生产的复合材料比手工铺层复合材料的成型更具抵抗力。的确，动态三点弯曲试验表明，这些复合材料在温度上升过程中会失去刚度。此外，复合材料的老化研究显示了在150°C下出现的穆林斯效应和磁滞现象。在室温下在蒸馏水中加速老化后，该复合材料的抗弯强度损失了约66％，但断裂伸长率却提高了195％。_g，与原始状态相比，该复合材料的抗挠性损失相同，但屈服变形得到180％。机械性能的损失可以通过酯官能水解和玻璃纤维的破坏来解释。