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Effects of Extractives on Dimensional Stability, Dynamic Mechanical Properties, Creep, and Stress Relaxation of Rice Straw/High-Density Polyethylene Composites

机译：萃取物对稻草/高密度聚乙烯复合材料尺寸稳定性，动态力学性能，蠕变和应力松弛的影响

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The removal of rice straw extractives increases the interphase adhesion between rice straw and the high-density polyethylene (HDPE) matrix, while eradicating the inner defects of rice straw/HDPE composites. This study investigated the effect of rice straw extractives removal on the dimensional stability (water uptake and thermal expansion), dynamic mechanical properties, creep, and stress relaxation of rice straw/HDPE composites. Cold water (CW), hot water (HW), and 1% alkaline solution (AL) extraction methods were utilized to remove rice straw extractives. Extracted and unextracted rice straws were mixed with HDPE, maleated polyethylene (MAPE), and Polyethylene wax to prepare composites via extrusion. Removal of rice straw extractives significantly improved the dimensional stability, dynamic mechanical properties, and creep and stress relaxation of rice straw/HDPE composites, with the exception of the thickness swelling of the AL/HDPE and the thermal expansion of the rice straw/HDPE composites. HW/HDPE exhibited the best comprehensive performance.
机译：去除稻草提取物可增加稻草与高密度聚乙烯（HDPE）基质之间的相间粘合力，同时消除稻草/ HDPE复合材料的内部缺陷。这项研究调查了稻草提取物的去除对稻草/ HDPE复合材料的尺寸稳定性（吸水率和热膨胀），动态力学性能，蠕变和应力松弛的影响。利用冷水（CW），热水（HW）和1％碱性溶液（AL）提取方法去除稻草提取物。将提取和未提取的稻草与HDPE，马来酸化的聚乙烯（MAPE）和聚乙烯蜡混合，以通过挤出制备复合材料。除AL / HDPE的厚度膨胀和稻草/ HDPE复合材料的热膨胀外，去除稻草提取物可显着改善稻草/ HDPE复合材料的尺寸稳定性，动态力学性能以及蠕变和应力松弛。 。硬件/高密度聚乙烯表现出最好的综合性能。

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