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Surface‐free energy analysis of hydrolyzed ethylene‐vinyl acetate copolymers
Author(s) -
Erbil H. Yildirim
Publication year - 1987
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.1987.070330427
Subject(s) - copolymer , vinyl acetate , vinyl alcohol , hydrolysis , ethylene , polymer chemistry , ethylene vinyl acetate , materials science , surface energy , chemistry , contact angle , organic chemistry , catalysis , polymer , composite material
Abstract Ethylene‐vinyl acetate (E‐VA) copolymers containing 12, 28, and 40 wt% of vinyl acetate, ethylene‐vinyl acetate‐vinyl alcohol terpolymers obtained by partial hydrolysis of (E‐VA) copolymers and ethylene‐vinyl alcohol (E‐VOH) copolymers obtained by complete hydrolysis of (E‐VA) copolymers were investigated by one‐liquid contact‐angle method. The polar force component of surface‐free energy (γ p SV ) of copolymers drastically increased by the substitution of the acetate groups with hydroxyl groups. The dispersion force component (γ d SV ) of copolymers increased only slightly with the hydrolysis degree and deviated largely from the additivity law in regards of the surface area functions. The surface‐free energy analysis of the cross‐linked ethylene‐vinyl alcohol and surface‐hydrolyzed ethylene‐vinyl acetate copolymers was also carried out.