CONTACT-ANGLE OF ORGANIC LIQUIDS ON POLY(BUTYL ACRYLATE) POLY(VINYLIDENE FLUORIDE-CO-HEXAFLUORO ACETONE) BLENDS/

The contact angles of organic liquids on poly(butyl acrylate) (PBA)/po ly(vinylidene fluoride-co-hexafluoro acetone) (P(VDF-HFA)) blends were measured. The contact angle, theta, of organic liquids on PBA/P(VDF-H FA) blends decreased exponentially with contact time t,i.e. log theta= Kt+C, where K is the proportionality constant and C is the intercept a t t=0. The K values were influenced by surface tension of organic liqu ids, gamma(L), and blend ratio. Especially, K decreased with increasin g P(VDF-HFA) content when hydrogen bonding (H) liquids were applied. W e concluded that the time dependence of theta is related to the molecu lar motion in polymers because the glass transition temperature, T-g, of the blends increases with increasing P(VDF-HFA) content.