Achieving a complete curing of biocomposites without damaging fibers is very challenging. This study assesses the impact of processing upon the mechanical properties of a unidirectional flax reinforced epoxy composite and identifies which component (resin, reinforcement or interphase) is the most sensitive to post-curing at high temperature (100, 120 or 150 °C).

Post-curing temperature had a limited impact on the composite mechanical behavior excepted at 150 °C where ultimate stress and strain decreased drastically while the stabilized modulus slightly increases.

Post curing is responsible of a slight decrease of the matrix tensile properties attributed to the polymer oxidation but cannot explain on its own the evolution of the composite behavior. Interfacial adhesion played a minor role in the composite behavior probably due to its intrinsic weakness. Finally, the flax fabric was highlighted to be the component most sensitive to thermal treatment thus governing the drop in the composite mechanical properties.

在不损坏纤维的情况下实现生物复合材料的完全固化是非常具有挑战性的。这项研究评估了加工工艺对单向亚麻增强环氧复合材料的机械性能的影响，并确定了哪种成分（树脂，增强材料或中间相）对高温（100、120或150°C）的后固化最敏感。

后固化温度对复合材料机械性能的影响有限，除了在150°C时，最终应力和应变急剧下降，而稳定模量略有增加。

后固化是由于聚合物氧化引起的基体拉伸性能略有下降的原因，但不能单独解释复合材料行为的演变。界面粘附在复合材料行为中起着次要作用，可能是由于其固有的弱点。最后，亚麻织物被强调为对热处理最敏感的成分，从而控制了复合材料机械性能的下降。