Adsorbent Column Polymer Modification Ratio Measurement
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Solution Overview
Problem
Current methods for measuring polymer modification ratios, such as gel permeation chromatography, require standard materials and are not accurate or suitable for larger polymers, necessitating a simpler and more precise method.
Innovation Solution
A method involving the adsorption and desorption of modified polymers onto an adsorbent column, using only the modified polymer for measurement, without the need for comparative standard materials, allowing for the calculation of modification ratios through chromatographic analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gel permeation chromatography is used to measure modification ratio, then measurement can be performed, but measurement accuracy is not ensured due to requirement of separate standard material and comparative measurement
Solution Approach 1:
The invention extracts and utilizes only the modified polymer component from the polymer mixture for measurement, eliminating the need for separate standard materials and comparative measurements. This is achieved by using an adsorbent that selectively adsorbs modified polymers, allowing direct measurement of the modified component without interference from unmodified polymers or requirement for standard material comparison.
Solution Approach 2:
The modified polymer itself serves as the measurement target without requiring external standard materials. The measurement system uses the intrinsic properties of the modified polymer (its ability to adsorb to the adsorbent) to perform self-characterization, eliminating the need for separate standard polystyrene materials and comparative analysis procedures.
2Measurement precision
If gel permeation chromatography with standard material comparison is used, then modification ratio can be calculated, but the process is complex and time-consuming
Solution Approach 1:
The invention extracts and measures only the modified polymer component directly, eliminating the time-consuming steps of preparing standard materials, performing comparative measurements, and calculating ratios based on differences. The modified polymer is selectively adsorbed and measured in a single direct process.
Solution Approach 2:
The adsorbent is pre-prepared with selective adsorption capability for modified polymers. When the polymer mixture is passed through the column, the modified polymers are automatically and selectively adsorbed, separating them from unmodified polymers before detection. This preliminary separation action simplifies the subsequent measurement process and reduces overall measurement time.
3Adaptability or versatility
If conventional GPC method is used for measurement, then standard polystyrene material is required, but this limits the ability to measure relatively large polymers accurately
Solution Approach 1:
The invention extracts and measures the modified polymer component directly without requiring it to be compared against standard polystyrene materials of known size. This direct measurement approach eliminates the limitations imposed by standard material molecular weight ranges, enabling accurate measurement of modified polymers across a broader size range including relatively large polymers.
Solution Approach 2:
The invention changes the measurement parameter from comparative chromatographic retention time (which depends on standard material calibration) to direct detection of adsorbed modified polymer. This parameter change allows measurement of polymers with various molecular weights without being constrained by the calibration range of standard polystyrene materials.
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 simplifies the measurement process, improves accuracy, and enables the measurement of larger polymers, providing a reliable index for polymer modification ratios and enhanced physical properties.
Implementation Method 1
a silica-based column (silica GPC column) capable of adsorbing modified components
Data Source
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AI summary
The present invention relates to a method for measuring a polymer modification ratio, and more particularly, to a method for measuring a polymer modification ratio, which includes preparing a first solution by dissolving a polymer mixture containing a modified polymer and an unmodified polymer in a first solvent, injecting the first solution into a column filled with an adsorbent, adsorbing the modified polymer onto the adsorbent, and eluting the first solution in which the unmodified copolymer is dissolved, transferring the eluted first solution to a detector, injecting a second solvent into the column to elute the second solution in which the adsorbed modified polymer is dissolved, and transferring the eluted second solution to the detector.