Developing laminar morphology in higher‐viscosity‐ratio polyblends by controlling flow fields in a single‐screw extruder
Developing laminar morphology in higher‐viscosity‐ratio polyblends by controlling flow fields in a single‐screw extruder
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DOI：
10.1002/pi.1576
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发表时间：
2005
影响因子：
3.2
通讯作者：
Hanxiong Huang;You-Fa Huang;Shurui Yang
中科院分区：
文献类型：
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作者：
Hanxiong Huang;You-Fa Huang;Shurui Yang
研究了采用单螺杆挤出机与收敛口模相结合的方法制备的不同熔体剪切粘度比（VR）的高密度聚乙烯（HDPE）/聚酰胺6（PA 6）共混物的形态结构。两种不同的螺杆几何形状，计量和混合螺杆，和三个螺杆速度，20，40和60转/分，进行了评估，以研究它们对挤出带的形态的影响。分别使用具有低剪切强度和高剪切强度的两个混合螺杆。螺杆的几何形状和转速对共混物的形态变化都有重要影响。与以前的研究相比，在这项工作中所示的结果表明，它是可能的开发一个层状结构的PA-6在HDPE基体与VR大于1通过控制流场，通过适当地结合的类型和剪切强度的螺杆与它的速度。在最佳组合下，得到了长径比约为100的层状PA-6相。版权所有© 2004化学工业协会
The morphology of high-density polyethylene (HDPE)/polyamide-6 (PA-6) blends with different melt-shear-viscosity ratios (VRs), prepared by combining a single-screw extruder with a convergent die was studied. Two different screw geometries, metering and mixing screws, and three screw speeds, 20, 40 and 60 rpm, were evaluated to investigate their effects on the morphology of extruded ribbons. Two mixing screws with low and high shear intensity, respectively, were used. Both the geometry and speed of screw were found to have an important role in the morphological changes of the blends. In contrast to previous studies, the results shown in this work reveal that it is possible to develop a laminar structure of PA-6 in an HDPE matrix with a VR larger than one by controlling the flow fields, through appropriately combining the type and shear intensity of the screw with its speed. A well-developed laminar PA-6 phase with an aspect ratio of about 100 was obtained under the optimum combination. Copyright © 2004 Society of Chemical Industry