Acrylic Acid Analysis via Moisture Ring Formation
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Solution Overview
Problem
Existing methods for analyzing acrylic acid content in acrylic copolymer adhesive resins, such as FT-IR and EGA-GC/MS, face issues like false positives and water obstruction, while MASS analysis requires optimal temperature conditions for accurate results.
Innovation Solution
Measuring moisture generated from the ring formation reaction of acrylic polymers using a self-manufactured MASS and calculating acrylic acid content through a specific equation, which corresponds with 1H HR MAS NMR results, ensuring accurate and reproducible analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If FT-IR is used to analyze acrylic acid content, then the presence of acrylic acid can be detected, but false positives occur when acrylic acid is not actually present
Solution Approach 1:
The patent changes the detection parameter from direct FT-IR spectral analysis to measuring moisture generation amount through ring formation reaction. By transforming the detection target from acrylic acid molecules themselves to the water molecules produced during their cyclization reaction, the method achieves more reliable quantitative analysis without false positives
Solution Approach 2:
The patent introduces moisture (water) as an intermediary substance for detection. Instead of directly detecting acrylic acid, the method detects the water molecules generated when acrylic acid undergoes ring formation reaction. This intermediary approach converts the detection problem into a more reliable moisture measurement task
2Measurement precision
If EGA-GC/MS is used to analyze acrylic acid content, then moisture generation from carboxylic groups can be measured, but water obstruction and peak overlapping problems occur
Solution Approach 1:
The patent extracts and isolates only the moisture measurement function from the complex EGA-GC/MS system. By using a simplified MASS device that solely measures moisture generation amount during ring formation reaction, the method eliminates the water obstruction and peak overlapping problems inherent in GC/MS while retaining the essential detection capability
Solution Approach 2:
The patent replaces the expensive, complex EGA-GC/MS system with a simpler, more affordable MASS device. The simplified device, while less sophisticated, provides sufficient functionality for the specific task of measuring moisture from acrylic acid ring formation without the drawbacks of the complex system
3Ease of operation
If MASS is used to analyze acrylic acid content, then moisture measurement is simplified, but optimal temperature conditions and sample amount optimization are required
Solution Approach 1:
The patent performs preliminary optimization of the ring formation reaction conditions, including temperature and sample amount parameters. By pre-establishing the optimal conditions (150-200°C temperature range and appropriate sample quantities), the method simplifies subsequent operations while ensuring accurate and reproducible results
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
The method provides a reliable and reproducible analysis of acrylic acid content in acrylic copolymer adhesive resins, matching the results with NMR experiments and avoiding the limitations of conventional methods.
Implementation Method 1
measuring the amount of moisture generated from the acrylic copolymer adhesive resin obtained by polymerization of two or more acrylic acid monomers by using a moisture analyzer for solid sample (MASS)
Data Source
AI summary
The present invention provides a quantitative analysis method of an acrylic acid content in an acrylic copolymer adhesive resin. The method of the present invention analyzes the acrylic acid content by measuring the amount of moisture generated from the acrylic polymer having carboxylic groups by a ring formation reaction under a high temperature environment by using a moisture analyzer for solid sample (MASS), and then calculating the acrylic acid content based on the measured amount of moisture and the used amount of the sample.