Capillary Viscometer Setup for Continuous Polymer Rheology Measurement
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Solution Overview
Problem
Existing methods for measuring polymer rheological properties during production are labor-intensive, time-consuming, and imprecise, making it difficult to monitor and control the properties effectively.
Innovation Solution
The use of devices and methods involving a series of capillary viscometers with differential pressure transducers and concentration detectors to rapidly and continuously measure rheological properties under varying shear rates, allowing for simultaneous determination of intrinsic viscosity and non-Newtonian behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional methods are used to measure polymer rheological properties, then measurement can be performed with simple equipment, but the process is labor-intensive and time-consuming
Solution Approach 1:
The patent combines multiple measurement functions into a single integrated system. A series of capillary viscometers with different bore sizes are connected in sequence, allowing simultaneous measurement of multiple rheological properties (intrinsic viscosity, non-Newtonian behavior) through one continuous polymer sample flow, thereby increasing productivity without proportionally increasing device complexity
Solution Approach 2:
The measurement system is designed to perform multiple functions using a single apparatus. The same capillary viscometer system can determine intrinsic viscosity, measure non-Newtonian behavior, and characterize polymer diffusion properties, eliminating the need for separate measurement devices and reducing overall system complexity while enhancing productivity
2Measurement precision
If traditional methods are used to measure polymer rheological properties, then equipment operation is simple, but measurement precision is insufficient
Solution Approach 1:
The measurement system is segmented into multiple capillary viscometers with different bore sizes connected in sequence. Each capillary segment measures specific rheological properties under different shear conditions, and the combined data provides comprehensive and precise characterization of polymer behavior, achieving high measurement precision through systematic division of measurement functions
Solution Approach 2:
The patent introduces computerized data acquisition and analysis systems as intermediaries between the physical measurement process and the final results. These systems automatically collect pressure differential data, calculate rheological properties, and generate comprehensive polymer characterizations, thereby achieving high measurement precision while managing system complexity through automated processing
3Reliability
If continuous monitoring of polymer rheology during production is implemented, then quality control is improved, but process complexity increases
Solution Approach 1:
The measurement system is designed for continuous operation where polymer sample flows continuously through the series of capillary viscometers without interruption. This continuous measurement capability enables real-time monitoring of rheological properties during production, improving quality control and reliability while the automated nature of the system prevents excessive increase in process complexity
Solution Approach 2:
The system incorporates computerized data acquisition that continuously monitors measurement results and can provide feedback for process control. This feedback mechanism enables real-time quality assurance by comparing measured rheological properties against target specifications, thereby improving reliability while managing complexity through automated control algorithms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid, precise monitoring and control of polymer rheology during production, providing accurate data for process optimization and quality assurance.
Implementation Method 1
a series of capillary viscometers, each comprising a capillary of a different radius and a differential pressure transducer
Implementation Method 2
Devices and methods for simultaneous determination of intrinsic viscosity and non-newtonian behavior of polymers
Data Source
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AI summary
Devices and methods for rapidly and incrementally or continuously, measuring rheological properties of polymers under different shear rates. The device includes a pump configured to accept a continuous stream of sample solution during an interval of time, an injector configured to inject a flow of the sample solution through two or more viscometers, and a computing and processing device configured to monitor and measure rheological properties of the solution under at least two shear rates simultaneously in the two or more viscometers.