共查询到15条相似文献,搜索用时 109 毫秒
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玻纤增强聚苯硫醚复合材料制备工艺与性能的研究 总被引:7,自引:4,他引:7
研究了玻璃纤维(GF)增强聚苯硫醚的双螺杆挤出及注塑成型工艺,探讨了螺杆剪切元件、注塑机料筒温度、试样热处理等加工工艺参数对复合材料性能的影响以及GF用量对复合材料力学性能的影响。结果表明:挤出机螺杆剪切块的数目决定了GF在基体中的尺寸和分散程度,当剪切块组数为5时复合材料具有较好的综合力学性能和制品外观;注塑温度为310℃时复合材料的综合力学性能更加优越;在实验条件下,成型后热处理反而使复合材料的力学性能略有下降;随GF用量的增加,复合材料的力学性能先升后降。 相似文献
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HDPE-g-MAH增容HDPE/木粉复合材料的制备及加工设备的研究 总被引:7,自引:0,他引:7
使用HDPE-g-MAH做增容剂,通过双螺杆挤出机制备了HDPE/木粉复合材料,对HDPE-g-MAH进行量变实验,通过力学性能测试确定了最佳用量,并利用SEM对材料微观形貌进行了观察。在此基础上又采用单螺杆挤出机、开炼机和密炼机等不同的加工设备分别制备了木塑复合材料,对力学性能进行了对比表征。结果表明:HDPE-g-MAH的加入很好地改善了木塑复合材料的界面相容性、力学性能和木粉的分散性,HDPE-g-MAH的最佳用量为5份;而且只有使用剪切效果优良的双螺杆挤出机才能制备出性能优异的木塑复合材料。 相似文献
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Naret Intawong Chatchawan Kantala Watit Lotaisong Narongrit Sombatsompop 《应用聚合物科学杂志》2011,120(2):1006-1016
A die‐rotating system was proposed in this work for moderations of extrusion forces and entrance pressure drop for molten polypropylene (PP) and wood/polypropylene (WPP) composites in a capillary rheometer and a single screw extruder. The effects of processing conditions and wood loading in PP were of our interests. The extrusion force and entrance pressure drop with and without the die rotating system were monitored in real‐time. This was the first time that the die‐rotating system was used for processing of highly viscous wood/polymer composite materials. It was found that the flow properties of the molten PP and WPP composites obeyed pseudoplastic non‐Newtonian behavior. The behavior was more obvious at wood contents of above 6 wt % and in the capillary rheometer. The rotation of the die could moderate the extrusion load by 60% and entrance pressure drop by 20% in the capillary rheometer, and the entrance pressure drop by 30% in the single screw extruder, especially at the conditions where the viscosities of the WPP and the extrusion rate were high. Greater fluctuations in entrance pressure drop caused by die rotation were observed in the single screw extruder. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120:1006–1016, 2011 相似文献
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