Page 95 - 《橡塑技术与装备》2025年6期

测试与分析
TEST AND ANALYSIS

3.2 实验结果讨论 接近时，对应的零切黏度较为准确。
研究将高速摄像机与毛细管流变仪的数据时效同 这一研究方法解决了毛细管流变仪无法直接测量
步，将高速摄像机拍摄画面与毛细管流变仪中物料参 零切黏度的问题。为物料流体流变特性的研究提供了
数数据精确对齐，保证了实验过程中物料挤出时刻压 新的实验思路。
力、温度等关键数据的准确记录，结合高速摄像机画
面，便于计算物料实时挤出速率，减小了因数据时效 参考文献 ：
[1] 周国奎 . 高压毛细管流变仪的研制 [D]，2015.
不同步所造成的误差。
[2] 赵凯晨 . 高黏度双料筒流变仪的研制与三基发射药流变性能的
通过数值模拟与实验数据对比，确定了物料的零 研究 [D]，2021.
切黏度范围为 275~395 Pa·s，并验证了基于幂律模型 [3] 郭泽元，胡少伟，金文粲，等 . PVC-U 轴向中空壁管挤出成
型工艺优化与数值模拟 [J]. 塑料工业，2023, 51(09):94-101.
的数学公式 v △ △ 0 进行流变分析 [4] 丁亚军，应三九 . 螺杆挤出过程中物料在线流变行为及其数值
3 1 2 0 1 模拟 [J]. 兵工学报，2015,36(08):1 437-1 442.
[5] 何家隆，谷琳，朱钰婷，等 . 固体推进剂螺旋压伸挤出过程流
的有效性。当仿真计算的物料流动速度与实验测得值
变模型建立 [J]. 中国塑料，2021,35(02):58-62.

Dynamic inversion method for zero shear viscosity of
capillary rheological materials with time synchronization

1
Li Bingxu , Gong Zhengwen , Zhou Shilong , Liu Yan , Zhang Guohui , Zhang Bing 1*
1
1
1
2*
(1. Beijing University of Chemical Technology, Beijing 100029, China;
2. Shanxi North Xing'an Chemical Industry Co. LTD., Taiyuan 030008, Shanxi, China)
Abstract: In order to solve the problem that capillary rheometer cannot directly measure zero shear
viscosity, a dynamic inversion method based on time synchronization was proposed in this study. This method
synchronizes the data from the high-speed camera and capillary rheometer to ensure accurate recording of
key parameters such as pressure and temperature during the experimental process. Combined with the real-
time image of the high-speed camera, the extrusion rate of the material is accurately calculated, effectively
reducing errors caused by asynchronous data. The study adopted a power-law model and improved the
measurement accuracy of zero shear viscosity through a combination of experiments and simulations. The
specific steps are as follows: Firstly, conduct an extrusion experiment using a capillary rheometer to obtain the
measured extrusion speed of the material. Subsequently, in the simulation experiment, the debugging method
was used to adjust the simulation input parameters, so that the extrusion rate obtained from the simulation
matched the measured value in the experiment, and then the true zero shear viscosity of the material was
calculated. The mathematical relationship between material extrusion rate and zero shear viscosity was
derived based on a power law model. The comparison between experimental and simulation data shows
that this method can effectively measure the zero shear viscosity range of materials, and ultimately determine
the zero shear viscosity range of the experimental materials to be 275~395 Pa . s.
Key words: capillary rheometer; zero shear viscosity; time synchronization; dynamic inversion
（R-03）

2025 第 51 卷 ·43·
年