Division of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie, Japan.
Langmuir. 2011 Jul 19;27(14):8672-7. doi: 10.1021/la201381t. Epub 2011 Jun 21.
Surface dilatational moduli of poly(vinyl acetate) (PVAc) film and blend films of PVAc and poly(n-hexyl isocyanate) (PHIC) were measured at the air-water interface. PVAc formed a film that was looser and also more stable against strain than the PHIC film. The apparent surface dilatational modulus and surface pressure of the blend films were superimposed on the lower concentration of PVAc, irrespective of the composition of PVAc. However, the additivity rule was not applicable to the apparent surface dilatational modulus and surface pressure. The scaling exponents of the apparent surface dilatational modulus against the added surface concentration decreased with an increase in the proportion of PVAc, suggesting that blend films gradually change from glass material to expanded films.
在空气-水界面处测量了聚醋酸乙烯酯 (PVAc) 薄膜和聚醋酸乙烯酯与聚正己基异氰酸酯 (PHIC) 的共混膜的表面扩张模量。PVAc 形成的膜比 PHIC 膜更疏松，对应变也更稳定。共混膜的表观表面扩张模量和表面压力叠加在较低浓度的 PVAc 上，与 PVAc 的组成无关。然而，加和性规则不适用于表观表面扩张模量和表面压力。随着 PVAc 比例的增加，表观表面扩张模量对添加表面浓度的标度指数减小，表明共混膜逐渐从玻璃材料变为膨胀膜。
