Polymer Rebound Resilience Evaluation via X-Ray Scattering
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Solution Overview
Problem
Current methods for evaluating the rebound resilience, hardness, and energy loss of polymer materials, such as those used in rubber products, suffer from high measurement errors and poor reproducibility, particularly when distinguishing between samples with small differences in performance.
Innovation Solution
The method involves irradiating polymer materials with X-rays or neutrons for small-angle X-ray or neutron scattering measurements, using specific formulas to determine the radius of gyration and number of scatterers per unit volume from scattering intensity curves, which correlates with rebound resilience, hardness, and energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lupke-type rebound resilience tester is used to measure rebound resilience, then the measurement method is simple and widely applicable, but the measurement accuracy is low and reproducibility is poor
Solution Approach 1:
The patent replaces the mechanical pendulum-based rebound resilience testing system with a molecular structure analysis system using NMR spectroscopy. Instead of mechanically impacting the material and measuring rebound height, the invention uses nuclear magnetic resonance to detect molecular structure parameters (specifically the ratio of 1,4-cis to 1,4-trans bond structures) that directly correlate with rebound resilience, thereby achieving high measurement accuracy without complex mechanical impact systems
Solution Approach 2:
The invention changes the measurement parameter from macroscopic mechanical response (rebound height) to microscopic molecular structure characteristics (NMR signal intensities of specific bond configurations). By measuring the ratio of 1,4-cis to 1,4-trans bond structures through NMR spectroscopy, the system achieves precise determination of rebound resilience based on molecular-level structural parameters rather than bulk mechanical behavior
2Measurement precision
If a JIS hardness tester is used to measure hardness, then the measurement method is simple and standardized, but the measurement accuracy is low and reproducibility is poor
Solution Approach 1:
The patent replaces the mechanical indentation-based hardness testing system with a molecular structure analysis system using NMR spectroscopy. Instead of applying mechanical pressure and measuring indentation depth, the invention uses nuclear magnetic resonance to detect molecular structure parameters (crosslinking density, chain configuration) that directly determine hardness, achieving high measurement accuracy without complex mechanical indentation systems
Solution Approach 2:
The invention changes the measurement parameter from macroscopic mechanical indentation response to microscopic molecular structure characteristics (NMR signal intensities indicating crosslinking density and chain conformation). By analyzing molecular-level structural parameters, the system achieves precise determination of hardness that correlates with actual material properties rather than surface deformation behavior
3Measurement precision
If dynamic viscoelasticity analysis is used to evaluate energy loss, then the measurement method is established and provides loss tangent values, but the measurement accuracy is low and reproducibility is poor
Solution Approach 1:
The patent replaces the dynamic mechanical analysis system that applies oscillating mechanical stress and measures energy dissipation with a molecular structure analysis system using NMR spectroscopy. Instead of measuring loss tangent through mechanical cycling, the invention uses NMR to detect molecular structure parameters (mobility of polymer chains, free volume characteristics) that directly correlate with energy loss, achieving high measurement accuracy without complex dynamic mechanical testing systems
Solution Approach 2:
The invention changes the measurement parameter from macroscopic dynamic mechanical response (loss tangent) to microscopic molecular structure characteristics (NMR relaxation times, molecular mobility indicators). By measuring molecular-level structural and dynamic parameters, the system achieves precise determination of energy loss properties based on fundamental molecular characteristics rather than bulk viscoelastic response
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
This approach significantly reduces measurement errors and enhances the accuracy and reproducibility of evaluating the differences in rebound resilience, hardness, and energy loss between samples, providing high measurement precision.
Implementation Method 1
irradiating a polymer material with X-rays to perform X-ray scattering measurement
Implementation Method 2
irradiating the polymer material with neutrons to perform neutron scattering measurement
Data Source
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AI summary
The present invention provides a method for evaluating the rebound resilience of polymer materials, capable of sufficiently evaluating the difference in performance between samples with excellent measurement accuracy. The present invention relates to a method for evaluating the rebound resilience of a polymer material, including irradiating the polymer material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.