Characterization of ethylene-1-butene copolymer by differential scanning calorimetry and 13C-NMR spectroscopy

Autor:	Keiichiro Kimura, Takeo Shigemura, Sakae Yuasa
Rok vydání:	1984
Předmět:	Ethylene Polymers and Plastics Analytical chemistry 1-Butene General Chemistry Nuclear magnetic resonance spectroscopy Surfaces Coatings and Films chemistry.chemical_compound Monomer Differential scanning calorimetry chemistry Materials Chemistry Melting point Copolymer Spectroscopy
Zdroj:	Journal of Applied Polymer Science. 29:3161-3170
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.1984.070291018
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bbcc367d8ba8385b514e33e92ecd33bb https://doi.org/10.1002/app.1984.070291018 Zobrazit plný text záznamu Plný text