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Dynamics of polypropene and propene‐ethylene copolymers at temperatures above ambient
Author(s) -
Zeigler Robert C.
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940860117
Subject(s) - copolymer , polyolefin , materials science , polymer , magic angle spinning , propene , polymer chemistry , spinning , solid state nuclear magnetic resonance , nuclear magnetic resonance spectroscopy , composite material , nuclear magnetic resonance , chemistry , organic chemistry , physics , catalysis , layer (electronics)
Several applications of solid‐state nuclear magnetic resonance (NMR) spectroscopy to studying polyolefin mobility at temperatures ranging from room temperature to above the polymer melt are described. 13 C NMR can be used with magic‐angle spinning and high‐power proton decoupling to determine the fraction of mobile polymer in polypropene and to characterize the nature of the polymer chain motions as a function of sample temperature. Similar techniques can be used to characterize the local motions of complex copolymer systems such as heterophasic ethylene‐propene copolymers. The practicality of low‐speed magic angle spinning to observe quantitative high‐resolution NMR spectra of neat, molten polymer samples is also described.