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Mixing studies and simulation of compounding chopped fiber and silica filler into thermoplastics in a modular co-rotating twin screw extruder.

机译：在模块化同向双螺杆挤出机中将短纤维和二氧化硅填料混入热塑性塑料中的混合研究和模拟。

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摘要

Mixing studies of glass fibers and silica filler into thermoplastics, two polypropylenes and polyamide 12, in co-rotating twin screw extruder were carried out. Fiber length and agglomerate sizes were determined at various positions along the screw in the twin screw extruder.;The damage of glass fibers at various conditions was investigated by varying viscosity, screw speed, screw configuration and glass fiber length and diameter. Increasing screw speed, melt matrix viscosity and glass fiber concentration were found to increase the extent of fiber breakage. Based on our experimental data and Euler buckling theory the composite modular kinetic model to describe glass fiber damage was developed. Regions of major and minor fiber breakage in co-rotating twin screw extruder were established. The simulation program based on experimental data and kinetic constants was developed. Comparisons were made between simulated results and experimental data.;Silica agglomerates were characterized by measuring their mass average values to avoid subjective result due to small filler particles. Silica agglomerate sizes as effected by viscosity, screw speed and filler concentration in co-rotating twin screw extruder were studied. The composite modular kinetic model for evaluating silica agglomerate breakup was developed. The kinetic constants of breakup and re-agglomeration for various conditions were calculated based on the stresses applied to agglomerates and their cohesive strength. Experimental data were compared with calculated results.;Generally, calculated results from the modified kinetic model of glass fiber and silica filler breakup showed reasonable agreement with experimental data.
机译：在同向旋转双螺杆挤出机中进行了玻璃纤维和二氧化硅填料到热塑性塑料，两种聚丙烯和聚酰胺12中的混合研究。在双螺杆挤出机中沿螺杆的各个位置确定纤维长度和附聚物尺寸。通过改变粘度，螺杆速度，螺杆构型以及玻璃纤维长度和直径，研究了在各种条件下玻璃纤维的损伤。发现增加螺杆速度，熔融基质粘度和玻璃纤维浓度会增加纤维断裂的程度。根据我们的实验数据和欧拉屈曲理论，建立了描述玻璃纤维损伤的复合模块化动力学模型。在同向旋转双螺杆挤出机中建立了主要和次要纤维断裂的区域。开发了基于实验数据和动力学常数的仿真程序。在模拟结果和实验数据之间进行了比较。；二氧化硅团聚物通过测量其质量平均值来表征，以避免由于较小的填料颗粒而产生主观结果。研究了在同向旋转双螺杆挤出机中，二氧化硅的团聚体尺寸受粘度，螺杆速度和填料浓度的影响。建立了用于评估二氧化硅团聚体破碎的复合模块动力学模型。基于施加于团聚体的应力及其内聚强度，计算出在各种条件下破碎和重新团聚的动力学常数。将实验数据与计算结果进行比较；通常，由改进的玻璃纤维和二氧化硅填料分解动力学模型计算的结果与实验数据合理吻合。

著录项

  • 作者

    Bumm, Sug Hun.;

  • 作者单位

    The University of Akron.;

  • 授予单位 The University of Akron.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 209 p.
  • 总页数 209
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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