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为探讨发泡剂偶氮二甲酰胺(AC)添加量对麦秸秆/聚丙烯(PP)发泡复合材料的热稳定性、微观结构以及化学结构的影响,采用TG-DSC、FTIR和体视显微镜分析了麦秸秆/PP发泡复合材料的热稳定性、化学结构和微观结构,并测定了复合材料的线性膨胀系数、导热系数、表观密度和力学性能。结果表明:AC添加量及其热分解程度均对麦秸秆/PP发泡复合材料的热稳定性、泡孔结构和热膨胀性能影响显著;当AC添加量为1.0wt%时,其热分解程度最高,复合材料具有较好的热稳定性,泡孔结构均匀,麦秸秆与基体界面稳定,线性膨胀系数最小。所得结论表明,当AC添加量为1.0wt%时,麦秸秆/PP发泡复合材料具有较好的综合性能。
In order to investigate the influence of foaming agent azodicarbonamide (AC) on thermal stability, microstructure and chemical structure of wheat straw / polypropylene (PP) foamed composites, TG-DSC, FTIR and stereovision The thermal stability, chemical structure and microstructure of wheat straw / PP foamed composite were analyzed microscopically. The linear expansion coefficient, thermal conductivity, apparent density and mechanical properties of the composites were measured. The results showed that both the amount of AC and the degree of thermal decomposition had a significant effect on the thermal stability, cell structure and thermal expansion of wheat straw / PP foam composites. When the amount of AC was 1.0wt%, the thermal decomposition was the highest , The composites have better thermal stability, uniform cell structure, stable interface between wheat straw and matrix, and minimum linear expansion coefficient. The results show that when the amount of AC added 1.0wt%, wheat straw / PP foam composite has good overall performance.