28
2026-01
Empowering Intelligent Polymer Manufacturing: Low-Field Time-Domain NMR Enables Minute-Level Quality Control of Dynamic Phase Composition and Chain Mobility in EMAA Ionomers
This article introduces the application of low-field time-domain nuclear magnetic resonance (TD-NMR) technology in polymer manufacturing, specifically focusing on EMAA ionomers. Traditional characterization methods struggle to provide in-situ, rapid analysis of polymers in the molten state, particularly within high-viscosity systems. By integrating the CPMG pulse sequence with a three-component fitting model, low-field TD-NMR enables the rapid resolution of dynamic phase composition in melts within approximately one minute. It distinguishes between low-, intermediate-, and high-mobility phases, quantitatively obtaining parameters for phase content and chain mobility. The research demonstrates that this technology clearly reveals the impact of factors like the degree of neutralization and plasticizers on phase structure and flow properties. It provides a microscopic basis for formulation optimization and process control, facilitating a shift in polymer R&D from "trial-and-error" to "directed design" and enabling minute-level quality control.
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