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Evaluation of EVA–PVAc blend behavior by 1‐D and 2‐D solid‐state NMR
Author(s) -
De Souza Cláudia M. G.,
Pacheco Carlos R.,
Tavares Maria I. B.
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990711)73:2<221::aid-app8>3.0.co;2-a
Subject(s) - miscibility , materials science , polymer blend , vinyl acetate , solid state nuclear magnetic resonance , magic angle spinning , polymer chemistry , polymer , nuclear magnetic resonance spectroscopy , copolymer , chemical engineering , composite material , nuclear magnetic resonance , chemistry , organic chemistry , physics , engineering
Ethylene‐ co ‐vinyl acetate and poly(vinyl acetate) blends were prepared in different proportions by melting in a HAAKE Rheomix mixer. The blends were prepared at a fixed temperature, rotation rate, and processing time. High‐resolution solid‐state nuclear magnetic resonance was chosen to characterize the blends with respect to structure–mobility–compatibility employing magic angle spinning with cross polarization and high‐power hydrogen decoupling and the measurements of the proton spin–lattice relaxation time in the rotating frame ( T H 1 ρ). The miscibility between polymer chains was also studied by two‐dimensional 1 H– 13 C shift correlation (HETCOR). © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 221–226, 1999