The Development Of High Pressure Capillary Rheometer

With the progress of science,technology and the development of economy,the application of polymer materials is more and more widely.Liquidity not only an important research task of Polymeric materials science.but also the content we must know when we produce polymer materials.So it's necessary to develop high pressure capillary rheometer.Proposed the design plan of high pressure capillary rheometer after considering operating requirement and relevant provisions of national standards.The structural stiffness of instruments has a direct impact on the result of shear rate.This paper analyzes the frame stiffness with Ansys software.Consistency of heating and uniformity of temperature distribution of the three barrel in these instruments has an important impact on the test results.Using Comsol Multiphysics heat transfer software modules to analyze the barrel temperature field.The paper put forward several heating scheme,anlyzing the barrel's crosswise and lengthways temperature field.Designing automatic cleaning system by simulating the manual cleaning barrel.Using the principle prototype to take repetitive experiments for several items and compared the results with standard data.Evaluate the performance of principle prototype.Overall design of the high pressure capillary rheometer has three barrel.In this scenario,only one test can get the result equivalent of the single-barrel high pressure capillary rheometer and double-barrel high pressure capillary rheometer test many times,and has high accuracy.The stiffness of instrument is guaranteed after using Ansys software.Getting the reasonable heating solutions after using comsol Multiphysics heat transfer software modules to anlyze the barrel's temperature field.The development of the automatic cleaning material system make cleaning barrel safe and convenient.The results show that the principle prototype has a high repeatability and accuracy after the experiment.The principlePrototype has reached the national standard in the various indexes.