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首页> 外文期刊>Journal of Applied Polymer Science >Effects of screw configurations on the grafting of maleic anhydride grafted low-density polyethylene in reactive extrusion
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Effects of screw configurations on the grafting of maleic anhydride grafted low-density polyethylene in reactive extrusion

机译：螺杆结构对反应挤出中马来酸酐接枝低密度聚乙烯接枝的影响

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摘要

The effects of screw configurations, that is, the staggering angles and disc widths of the kneading blocks, on grafting reactive extrusion for maleic anhydride grafted low-density polyethylene were investigated in a corotating twin-screw extruder. Samples were collected from three positions along the screw and the die exit. The grafting degree (GD) of the specimens was evaluated by titration. It was found that the kneading block configurations had a significant influence on the grafting reactive extrusion. In addition, another three groups of extrusion experiments were performed to explore the intrinsic relationship between the GD, the degree of fill in the screw channel, the residence time distribution (RTD), and the mixing intensity in various screw configurations. The experimental results indicated that the location of the melting endpoint significantly affected the position at which the reaction began; the degree of fill, RTD, and mixing performance of the screw played important roles in the grafting reaction. The reverse kneading blocks with a narrow disc width, which had a high degree of fill and good mixing capacity, enhanced the increase in GD along the screw during the reactive extrusion. (C) 2008 Wiley Periodicals, Inc.
机译：在同向旋转双螺杆挤出机中，研究了螺杆构型（即捏合块的错位角和盘宽）对顺丁烯二酸酐接枝低密度聚乙烯的接枝反应性挤出的影响。从沿着螺杆和模具出口的三个位置收集样品。通过滴定评估样品的接枝度（GD）。发现捏合块的构型对接枝反应性挤出有显着影响。此外，还进行了另外三组挤压实验，以探索GD，螺杆通道的填充程度，停留时间分布（RTD）和各种螺杆配置下的混合强度之间的内在联系。实验结果表明，熔解终点的位置显着影响了反应开始的位置。螺杆的填充度，RTD和混合性能在接枝反应中起着重要作用。圆盘宽度较窄的反向捏合块具有较高的填充度和良好的混合能力，可提高反应性挤出过程中沿螺杆的GD的增加。 （C）2008 Wiley期刊公司

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