Abstract. 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.
Determination of the Oligomeric State of SecYEG Protein Secretion Channel Complex Using in Vivo Photo- and Disulfide Cross-linking