## 3 Results
### Work of Adhesion of Organic Solvents on Modified Copolymer
\begin{table}
\begin{tabular}{c c c c c c} \hline n-nonane & \(W_{n}(T)=-0.447+247.09\) & 0.44 & 247.09 & 556.26 & 0.9622 \\ \hline Benzene & \(W_{n}(T)=-0.56\) T + 301.56 & 0.56 & 301.56 & 540.91 & 0.9769 \\ \hline Toluene & \(W_{n}(T)=-0.48\) T + 295.44 & 0.48 & 295.44 & 614.09 & 0.9325 \\ \hline Ethyl acetate & \(W_{n}(T)=-0.92\) T + 507.43 & 0.92 & 507.43 & 584.51 & 0.9892 \\ \hline Ethanol & \(W_{n}(T)=-1.32\) T + 753.74 & 1.32 & 753.74 & 569.94 & 0.9949 \\ \hline i-Propanol & \(W_{n}(T)=-1.29\) T + 716.03 & 1.29 & 716.03 & 556.01 & 0.9931 \\ \hline Dichlormethane & \(W_{n}(T)=-0.85\) T + 432.53 & 0.85 & 432.53 & 508.32 & 0.997 \\ \hline \multicolumn{5}{c}{**5\% 5-Fluoracil/5-DVB Copolymer**} \\ \hline Solvents & \(W_{n}(T)\) & \(\Delta S_{\rm S}\) & \(\Delta H_{\rm S}\) & \(T_{\rm Mars.}\) & \(\mathbb{R}^{2}\) \\ \hline n-hexane & \(W_{n}(T)=-0.91\) T + 438.27 & 0.91 & 438.27 & 479.61 & 0.9983 \\ \hline n-heptane & \(W_{n}(T)=-0.60\) T + 309.29 & 0.60 & 309.29 & 512.15 & 0.9978 \\ \hline n-octane & \(W_{n}(T)=-0.55\) T + 293.5 & 0.85 & 293.5 & 530.26 & 0.9956 \\ \hline n-nonane & \(W_{n}(T)=-0.54\) T + 292.32 & 0.54 & 292.32 & 541.53 & 0.9941 \\ \hline Benzene & \(W_{n}(T)=-0.6554\) T + 347.96 & 0.6554 & 347.96 & 530.91 & 0.9961 \\ \hline Toluene & \(W_{n}(T)=-0.6949\) T + 415.71 & 0.6949 & 415.71 & 596.23 & 0.9927 \\ \hline Ethyl acetate & \(W_{n}(T)=-1.2143\) T + 693.27 & 1.2143 & 693.27 & 570.92 & 0.9986 \\ \hline Ethanol & \(W_{n}(T)=-1.7361\) T + 880.53 & 1.7361 & 880.53 & 507.19 & 0.9993 \\ \hline i-Propanol & \(W_{n}(T)=-1.7287\) T + 963.71 & 1.7287 & 963.71 & 557.48 & 0.9991 \\ \hline Dichlormethane & \(W_{n}(T)=-0.9861\) T + 507.27 & 0.9861 & 507.27 & 514.42 & 0.9991 \\ \hline \multicolumn{5}{c}{**100\% 5-Fluoracil/5-DVB Copolymer**} \\ \hline Solvents & \(W_{n}(T)\) & \(\Delta S_{\rm S}\) & \(\Delta H_{\rm S}\) & \(T_{\rm Mars.}\) & \(\mathbb{R}^{2}\) \\ \hline n-hexane & \(W_{n}(T)=-0.94\) T + 451.85 & 0.94 & 451.85 & 479.67 & 0.9976 \\ \hline n-heptane & \(W_{n}(T)=-0.64\) T + 327.09 & 0.64 & 327.09 & 510.76 & 0.9992 \\ \hline n-octane & \(W_{n}(T)=-0.59\) T + 313.4 & 0.59 & 313.4 & 527.52 & 0.9986 \\ \hline n-nonane & \(W_{n}(T)=-0.58\) T + 313.9 & 0.58 & 313.9 & 537.68 & 0.9981 \\ \hline Benzene & \(W_{n}(T)=-0.70\) T + 369.84 & 0.70 & 369.84 & 528.04 & 0.9987 \\ \hline Toluene & \(W_{n}(T)=-0.77\) T + 484.8 & 0.77 & 484.8 & 627.41 & 0.9978 \\ \hline Ethyl acetate & \(W_{n}(T)=-1.28\) T + 744.91 & 1.28 & 744.91 & 581.55 & 0.9996 \\ \hline Ethanol & \(W_{n}(T)=-1.77\) T + 912.74 & 1.77 & 912.74 & 515.38 & 0.9998 \\ \hline i-Propanol & \(W_{n}(T)=-1.80\) T + 1031.2 & 1.80 & 1031.2 & 572.89 & 0.9997 \\ \hline Dichlormethane & \(W_{n}(T)=-0.93\) T + 478.52 & 0.93 & 478.52 & 514.04 & 0.9993 \\ \hline \end{tabular}
\end{table} 
Table 4: _Cont._until the work of adhesion \(W_{a}(T,q)\). The uncertainty about the retention time was about 1%, but other sources of uncertainty were made from other experimental parameter values such as the dispersive and polar free energies of adsorption, the London dispersive and polar surface energy of copolymers, and the work of adhesion. The combination of Equations (14)-(16) led to a universal equation giving the work of adhesion \(W_{a}(T,q)\) of an organic solvent on a copolymer, modified by a modifier percentage \(q\):  
\[W_{a}(T,q)=aq+b-T(cq+d) \tag{22}\]  
\(W_{a}(T,q)\), given by Equation (22), is a function of two variables, \(T\) and \(q\). The above equation represents a quantification of the work of adhesion, when the temperature and the modifier percentage are known.