Abstract Lignin was used to study the mechanical properties and thermal stability of polymers. The lignin was blended with three kinds of polymers, and the addition of lignin was 0.5 wt%. Under the condition of thermal oxidation, the thermal stability of lignin/polymer samples varies with the structure of lignin. The effects of lignin on the mechanical properties and thermal stability of the polymers were investigated by oxidation induction time (OIT), rheological properties, mechanical properties and differential scanning calorimetry (DSC). The results show that the effect of lignin on the thermal properties of polymer samples is 2~3°C. It can be inferred that lignin can effectively improve the interaction between polymer molecular chain segments, and improve the crystallization rate and rigidity to a certain extent, so it can be seen that lignin has good compatibility and thermal stability.

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不同木质素体系在聚合物中的作用：机械性能和热稳定性

摘要 木质素用于研究聚合物的力学性能和热稳定性。木质素与三种聚合物共混，木质素的添加量为0.5wt%。在热氧化条件下，木质素/聚合物样品的热稳定性随木质素的结构而变化。通过氧化诱导时间(OIT)、流变性能、力学性能和差示扫描量热法(DSC)研究木质素对聚合物力学性能和热稳定性的影响。结果表明，木质素对聚合物样品热性能的影响为2~3℃。可以推断木质素可以有效改善聚合物分子链段之间的相互作用，在一定程度上提高结晶速度和刚度，