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Dynamic–mechanical properties of modified poly(ethylene‐co‐vinyl acetate)
Author(s) -
Barbosa Ronilson V.,
Neto Ricardo B.,
Mauler Raquel S.,
Gorga Carlos J. Perez,
Schneider Cláudia G.,
Simanke Adriane G.
Publication year - 2005
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/app.21883
Subject(s) - vinyl acetate , copolymer , ethylene vinyl acetate , polymer chemistry , vinyl alcohol , ethylene , materials science , dynamic mechanical analysis , polymer , infrared spectroscopy , chemistry , organic chemistry , catalysis , composite material
To study the relationship among relaxation peaks observed in dynamic mechanical experiments and the structure of poly(ethylene‐ co ‐vinyl acetate) (EVA), EVA copolymers with different substitution in the carbonyl group were synthesized. EVA was hydrolyzed to obtain poly (ethylene‐ co ‐vinyl alcohol) and was subsequently reacted with formic, hexanoic, and octanoic acids. The copolymers synthesized were characterized by infrared spectroscopy. Analysis of the DMA spectra of the copolymers showed that their relaxation behavior depends on the vinyl acetate concentration. The α‐ and β‐transitions were observed in EVA copolymers with 8 and 18 wt % of functional groups, and the relationship among relaxation process with the structure of polymer was investigated. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1371–1376, 2005