Two kinds of ethylene‐1‐butene copolymers that were produced by the different procedures, that is, the slurry and the high‐pressure polymerizations, were characterized by differential scanning calorimetry (DSC) and carbon‐13 nuclear magnetic resonance (13C‐NMR) spectroscopy. The melting points of both copolymers were found to be different in spite of the same 1‐butene content. It was deduced that this phenomenon depended upon the subtly different chain structures between these two copolymers from the tetrad monomer sequence analysis by 13C‐NMR method. In addition, the behavior of the composition fractionation by temperature rising elution technique was also considered to be affected by the chain structures.
No takes yet. Share an insight, caveat, or question.
Kimura et al. (1984) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: