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Effect of the melt flow index of an HDPE matrix on the properties of composites with wood particles
Polymer Testing ( IF 5.1 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.polymertesting.2020.106678
Marcelo Sousa de Carvalho , Joyce Batista Azevedo , Josiane Dantas Viana Barbosa

Abstract Composites of wood waste and high-density polyethylene (HDPE) resins and different melt flow index (MFIs) was development in this work. Therefore, it was possible to assess their effect on the mechanical, thermal, and morphologic properties of these composites. The formulations were prepared using a twin-screw extruder, and the MFI, tensile strength, flexural strength, and impact strength of the composites were analyzed. Additionally, the thermal properties were evaluated by differential scanning calorimetry (DSC). Finally, structural analyses using optical microscopy (OM) and scanning electron microscopy (SEM) were performed to assess the particles’ dispersion, distribution, and adhesion to the polymer matrix. The results indicated that composites from HDPE resins with a lower MFI yielded a better dispersion of the wood waste. During processing was observed, reduce the MFI and better dispersion of the polymer matrix, which positively influenced some of the mechanical properties analyzed in the study.

中文翻译:

HDPE基体熔体流动指数对含木颗粒复合材料性能的影响

摘要 这项工作正在开发木材废料和高密度聚乙烯 (HDPE) 树脂以及不同熔体流动指数 (MFI) 的复合材料。因此,可以评估它们对这些复合材料的机械、热和形态特性的影响。使用双螺杆挤出机制备配方,并分析了复合材料的 MFI、拉伸强度、弯曲强度和冲击强度。此外,还通过差示扫描量热法 (DSC) 评估了热性能。最后,使用光学显微镜 (OM) 和扫描电子显微镜 (SEM) 进行结构分析,以评估颗粒的分散、分布和对聚合物基体的粘附。结果表明,由具有较低 MFI 的 HDPE 树脂制成的复合材料可更好地分散木材废料。
更新日期:2020-10-01
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