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- W2171114414 endingPage "1448" @default.
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- W2171114414 abstract "Four ethylene-1-octadecene copolymers and the corresponding polyethylene homopolymer, synthesized with a metallocene catalyst, have been analyzed by using three characterization techniques in the solid state: differential scanning calorimetry, wide-angle X-ray diffraction, and Raman spectroscopy. Very important annealing effects are observed in the copolymers with higher comonomer content while standing at room temperature, in such a way that the enthalpies of melting derived from the first and second melting are different. The X-ray diffractograms have been analyzed in terms of amorphous and crystalline components, determining both the crystallinity and the position of the different reflections. The variation of the unit cell parameters has been calculated from those reflections. No indication of a possible participation of the relatively long 1-octadecene branches in the crystallization can be deduced from the X-ray data. The degree of crystallinity has also been determined from the Raman spectra, following two procedures. The results indicate that the crystallinities deduced from the band at 1416 cm−1 are much lower than those derived from the other two characterization techniques. On the contrary, the data from the 1060 cm−1 band are practically coincident with the X-ray determinations. © 2000 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 38: 1440–1448, 2000" @default.
- W2171114414 created "2016-06-24" @default.
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- W2171114414 date "2000-06-01" @default.
- W2171114414 modified "2023-10-12" @default.
- W2171114414 title "Structure characterization of copolymers of ethylene and 1-octadecene" @default.
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- W2171114414 doi "https://doi.org/10.1002/(sici)1099-0488(20000601)38:11<1440::aid-polb40>3.0.co;2-o" @default.
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