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Surface free energy analysis of ethylene-vinyl acetate copolymers

✍ Scribed by Toshiaki Matsunaga; Yasukatsu Tamai

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
274 KB
Volume
22
Category
Article
ISSN
0021-8995

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✦ Synopsis

Ethylene-vinyl acetate copolymers containing 4, 11, and 19 wt. % of vinyl acetate (VAc), polyethylene, and poly(viny1 acetate) were investigated by the two-liquid contact-angle method a t 20°C. The dispersion force component of surface free energy -y$ increased 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 t . , mainly due to hydrogen bonding) interaction free energy between solid and water I z w increased linearly with the concentration of VAc on the surface.

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