The contact angles 0 of dispersion (D), polar (P) and hydrogen bonding (H) liquids on poly (vinylidene fluoride-co-hexafluoroacetone ) (P (VDF-HFA); HFA content 6.5, 8.3 and 10.4 mol % ) were measured. The critical surface tensions 7c of P(VDF-HFA) were evaluated by the Zisman plot (cos 0 versus 7L), Young-Dupre-Good-Girifalco plot (1 + cos 0 versus 1/7 °"5) and the log(1 + cos 0) versus log(TL) plot. The following results were obtained: the yc values of P(VDF-HFA) evaluated for the P liquids were larger than those for the D and H liquids; the 7o values estimated by the Zisman plot were smaller than those obtained by the other plots; the surface tension Ys values of P(VDF-HFA) revealed a minimum at the HFA content of 8.3 mol%. It was expected that P(VDF-HFA) with HFA = 8.3 mol% induced surface segregation most easily.
Посилання на статтю:
Critical surface tension of poly(vinylidene fluoride-co-hexafluoroacetone) by the contact angle method / Yoshihasa Kano // Polymer. – 1992. – Vol 33. – P. 1690-1695.