Abstract
A single-point imaging-based method for broad-line analysis is presented. The technique is used for obtaining spectroscopic information of a two-component covulcanized rubber sample. A new noninvasive procedure allows for the discrimination of natural rubber and poly(styrene-cobutadiene) rubber components, resulting in chemical and mechanical characterization of the sample interface. On the basis of the space-resolved chemical shift weighted measurements a sharp interface of thickness less than 200 um was found. Spin-spin relaxation weighted profiles show a wider interface, with a gradual cross-link density change extended to about 500 μm over the natural-rubber component.
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