Single-sided NMR for the measurement of the degree of cross-linking and curing

The degree of cross-linking and curing is one of the most important values concerning the quality of cross-linked polyethylene (PE-X) and the functionality of adhesives and resin-based components. Up to now, the measurement of this property has mostly been time-consuming and usually destructive. Wit...

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Bibliographic Details
Published inJournal of sensors and sensor systems Vol. 7; no. 1; pp. 21 - 30
Main Authors Halmen, Norbert, Kugler, Christoph, Kraus, Eduard, Baudrit, Benjamin, Hochrein, Thomas, Bastian, Martin
Format Journal Article
LanguageEnglish
Published Gottingen Copernicus GmbH 24.01.2018
Copernicus Publications
Subjects
Adhesion tests
Analysis
Applied research
Chemical analysis
Cross-linked polyethylene
Crosslinking
Curing
Dielectric properties
Dielectric relaxation
Differential scanning calorimetry
Measurement
Methods
NMR
Nuclear magnetic resonance
Organic chemistry
Polyethylene
Polymer crosslinking
Properties
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Summary:The degree of cross-linking and curing is one of the most important values concerning the quality of cross-linked polyethylene (PE-X) and the functionality of adhesives and resin-based components. Up to now, the measurement of this property has mostly been time-consuming and usually destructive. Within the shown work the feasibility of single-sided nuclear magnetic resonance (NMR) for the non-destructive determination of the degree of cross-linking and curing as process monitoring was investigated. First results indicate the possibility of distinguishing between PE-X samples with different degrees of cross-linking. The homogeneity of the samples and the curing kinetics of adhesives can also be monitored. The measurements show good agreement with reference tests (wet chemical analysis, differential scanning calorimetry, dielectric analysis). Furthermore, the influence of sample temperature on the characteristic relaxation times can be observed.
ISSN:2194-878X
2194-8771
2194-878X
DOI:10.5194/jsss-7-21-2018