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Development of Green Composites Based on Polypropylene and Corncob Agricultural Residue

机译：基于聚丙烯和玉米板农业残留的绿色复合材料的开发

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摘要

Green composites of polypropylene (PP) and corncob (CCB) agricultural residue with CCB content ranging from 5 to 30wt% were compounded by melt extrusion and their properties investigated by density measurements, thermogravimetric analyses, differential scanning calorimetry, scanning electron microscopy (SEM) and tension, flexural and impact properties. Properties were dependent on CCB content. SEM micrographs showed that PP/CCB composites are composed of all layers of the corncob, but with a higher content of woody ring and pith. Composites with CCB up to 20wt% presented particles evenly dispersed into PP matrix and density values ranging from 0.929 to 1.026g/cm(3). Thermal analyses showed that CCB is thermally stable up to 200 degrees C, ensuring that no degradation took place during processing, and PP/CCB composites are more crystalline than neat PP. Tensile strength and elongation at break of the composites decreased respectively from 30 to 20MPa, and 22.7 to 3.7%, and the elastic modulus increased while the impact strength remained practically constant at 14J/m for the filling contents tested. Elastic and flexural moduli increased respectively from 906MPa to 1.1GPa and from to 1.26 to 1.81GPa with corncob addition.
机译：通过熔融挤出和通过密度测量，热重分析，差示扫描量热法，扫描电子显微镜（SEM）和差分扫描量热法，扫描电子显微镜（SEM）和差动扫描量热法，扫描电子显微镜（SEM）和其性质进行了5至30wt％的CCB含量的绿色复合物。张力，弯曲和影响特性。性质依赖于CCB含量。 SEM显微照片显示PP / CCB复合材料由玉米浦的所有层组成，但具有更高的木质环和佩斯含量。 CCB的复合材料高达20wt％呈现的颗粒均匀地分散到PP基质中，密度值范围为0.929至1.026g / cm（3）。热分析表明，CCB热稳定可达200​​℃，确保在加工过程中未发生降解，并且PP / CCB复合材料比整齐PP更结晶。复合材料断裂的拉伸强度和伸长率分别从30-20MPa降低，22.7％至3.7％，并且弹性模量增加，而冲击强度在14J / m处仍然恒定，用于测试填充内容物。弹性和弯曲模量分别从906MPa增加到1.1GPa和玉米浦添加到1.26至1.81gPa。

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  • 来源
    《Journal of Polymers and the Environment》 |2019年第8期|1677-1685|共9页
  • 作者

    Ramos R. R. F.; Siqueira D. D.; Wellen R. M. R.; Leite I. F.; Glenn G. M.; Medeiros E. S.;

  • 作者单位

    Univ Fed Paraiba Mat & Biosyst Lab LAMAB Dept Mat Engn BR-58051900 Joao Pessoa PB Brazil|Univ Fed Rio Grande do Norte Dept Text Engn BR-59064741 Natal RN Brazil;

    Univ Fed Campina Grande Dept Mat Engn BR-58429140 Campina Grande PB Brazil;

    Univ Fed Paraiba Mat & Biosyst Lab LAMAB Dept Mat Engn BR-58051900 Joao Pessoa PB Brazil;

    Univ Fed Paraiba Mat & Biosyst Lab LAMAB Dept Mat Engn BR-58051900 Joao Pessoa PB Brazil;

    USDA Bioprod Res Unit WRRC PWA Albany CA 94710 USA;

    Univ Fed Paraiba Mat & Biosyst Lab LAMAB Dept Mat Engn BR-58051900 Joao Pessoa PB Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Composites; Polypropylene; Corncob; Agricultural residues;

    机译：复合材料;聚丙烯;玉米芯;农业残留物;

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