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Surface free energy analysis of ethylene‐vinyl acetate copolymers
Author(s) -
Matsunaga Toshiaki,
Tamai Yasukatsu
Publication year - 1978
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.1978.070221216
Subject(s) - vinyl acetate , copolymer , ethylene vinyl acetate , polyethylene , polymer chemistry , surface energy , materials science , contact angle , ethylene , vinyl polymer , dispersion (optics) , chemical engineering , chemistry , organic chemistry , polymer , composite material , catalysis , physics , optics , engineering
Ethylene‐vinyl acetate copolymers containing 4, 11, and 19 wt. % of vinyl acetate (VAc), polyethylene, and poly(vinyl acetate) were investigated by the two‐liquid contact‐angle method at 20°C. The dispersion force component of surface free energy γ d Sincreased drastically with the increase of VAc content, and deviated largely from the additivity law in regards of the surface area fractions of ethylene and VAc. On the other hand, the nondispersive (i.e., mainly due to hydrogen bonding) interaction free energy between solid and water I n SWincreased linearly with the concentration of VAc on the surface.