研究流变参数比对热塑性聚氨酯混合物混合性能的影响

IF 1.8 4区工程技术 Q3 POLYMER SCIENCE

Macromolecular Theory and Simulations Pub Date : 2024-05-30 DOI:10.1002/mats.202400031

Yiwen Zheng, Jiankang Wang, Chenyang Wang, Zhijun Li, Zuliang Yang

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引用次数: 0

摘要

为了研究混合物流变参数对动态混合器混合性能的影响，模拟了高粘度和低粘度虚拟材料（VM）/热塑性聚氨酯（TPU）在动态混合器中的流动。采用田口正交法分析了零剪切粘度比（η0VM/η0TPU）、松弛时间比（λVM/λTPU）和非牛顿指数比（NVM/NTPU）等流变参数比对压降（Δp）、偏析尺度（S）和功耗（P）的影响，并采用单因素法研究了转子转速（n）和流速比（QVM/QTPU）的影响。结果表明，η0VM/η0TPU 是影响 Δp、S 和 P 的最重要因素。当 η0VM/η0TPU = 1、λVM/λTPU = 1、NVM/NTPU = 1 时，混合料的 S 达到最小值。随着 n 的增加，QVM/QTPU 和热塑性聚氨酯粘度对 S 的影响减小。本文受版权保护。

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Investigating the Effect of Rheological Parameter Ratios on the Mixing Properties of TPU Blends

In order to investigate the effect of rheological parameter of blends on mixing performance of dynamic mixers, the flow of virtual material (VM)/thermoplastic polyurethanes (TPU) with high and low viscosities in it are simulated. The effect of rheological parameter ratios, including zero shear viscosity ratio (η_0VM/η_0TPU), relaxation time ratio (λ_VM/λ_TPU) and non-Newtonian index ratio (N_VM/N_TPU) on pressure drop (Δp), segregation scale (S), and power consumption (P) are analyzed using Taguchi Orthogonal Method, and the effects of rotation speed (n) of the rotor and flow rate ratio (Q_VM/Q_TPU) are studied using single factor method. The results indicate η_0VM/η_0TPU is the most significant factor affecting Δp, S, and P. When η_0VM/η_0TPU = 1, λ_VM/λ_TPU = 1, N_VM/N_TPU = 1, S of blends reach the minimum value. With n increasing, the influences of Q_VM/Q_TPU and viscosity of TPU on S are reduced.

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来源期刊

Macromolecular Theory and Simulations 工程技术-高分子科学

CiteScore

3.00

自引率

14.30%

发文量

审稿时长

2 months

期刊介绍： Macromolecular Theory and Simulations is the only high-quality polymer science journal dedicated exclusively to theory and simulations, covering all aspects from macromolecular theory to advanced computer simulation techniques.