ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
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.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1984.070291018
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