ABSTRACT
For octane (cf. table IV-2): ΔG1w1 = 0 – 0 –102 + 0 = –102 mJ/m2, which is for 100% of AB origin. For a hydrophilic, non-polar polymer with γ1 = 40 mJ/m2, γ 1 = 0 and γ 1 = 50 mJ/m2 (cf. eq. IV-17 and Table IV-2): ΔG1w1 (see eq. VIII-2) becomes: –5.5 – 0 – 102 + 127.8 = + 20.3 mJ/m2, which is still for 73% of AB origin. Thus the LW free energy of interaction between two identical hydrophobic materials, immersed in water (ΔG wLW1 1) usually is from zero to less than 10% of the total ΔG1w1. The AB free energy of interaction between two identical hydrophilic materials, immersed in water (ΔG wAB1 1), usually ranges between 100%, and at least 70% of the total ΔG1w1. Conversely, the components of the free energies of hydration (ΔG wLW1 and ΔG wAB1 ) are, respectively, 100% ΔG wLW1 for completely non-polar (hydrophobic) materials and approximately 45% ΔG wLW1 vs. 55% ΔG wAB1 for extremely hydrophilic materials; see Chapters IX and X, below.
