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首页> 外文期刊>Journal of Applied Polymer Science >Extension-dominatedimproved dispersive mixing insingle-screwextrusion. Part 1: Computational and experimental validation
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Extension-dominatedimproved dispersive mixing insingle-screwextrusion. Part 1: Computational and experimental validation

机译：延伸 - 被定制的分散式混合搅拌夹层 - 螺旋挤出。 第1部分：计算和实验验证

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摘要

Extensional mixing elements (EMEs) were previously developed for twin-screw extruders (TSEs) to incorporate extensional flows through stationary single-plane or double-plane hyperbolic convergence-divergence channels. In Part 1 of this work, the EME concept is extended to single-screw extruders (SSEs), which are known for their good pumping characteristics but limited dispersive mixing capability, to enhance the latter. Flow simulations are performed to optimize the EME design for SSE. Experimental validations are performed on immiscible polymer blends (varying viscosity ratio) and nanocomposites. Morphological results show tremendous improvement in mixing capability of SSE when equipped with EME without significant throughput and pressure drop penalties. Rheological and crystallinity studies are observed to be in line with the morphological analysis. Morphological and mechanical results are benchmarked with TSE operations in Part 2 of this work.
机译：拉伸混合元件（EME）以前是为双螺杆挤出机（TSE）开发的，用于通过固定的单平面或双平面双曲收敛-发散通道合并拉伸流动。在本工作的第1部分中，EME的概念被扩展到单螺杆挤出机（SSE），后者以其良好的泵送特性而闻名，但分散混合能力有限，以增强后者。为了优化SSE的EME设计，进行了流动模拟。对不相容聚合物共混物（不同粘度比）和纳米复合材料进行了实验验证。形态学结果表明，当配备EME时，SSE的混合能力有了极大的提高，而没有显著的吞吐量和压降损失。流变学和结晶度研究与形态学分析一致。在本研究的第2部分中，形态学和力学结果以TSE操作为基准。

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