Solution-state NMR studies of cross-linking

H AND SOLUTION-STATE NMR OF IRRADIATED POLYMERS 3.1. Solution-state NMR studies of cross-linking 

A fundamental impediment to the use of solution-state NMR in the analysis of cross-linked materials is the tendency of the polymers to become partially insoluble at the gel dose. As will be discussed below the rapid increase in strength 

None-the-less, a number of thorough studies of cross-linking in high poly(ole-tin)s have been reported. In early work, Randall et a/. - studied irradiated high-density poly(ethylene)s (HOPE) using - C NMR, and identified a number of new structures, including internal double bonds and Y-type cross-links. The materials under consideration contained initially a high concentration of vinyl end 

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