## 3 Results and Discussion  
### Chemical Structure Characterization  
The structure of the obtained polymers was confirmed by the ATR FTIR technique. The collected spectra are shown in Figure 2. To visualize the differences better, the spectra were grouped into pairs with the same chemical composition but different porogenic systems (t-toluene, db-mixture of decanol and benzyl alcohol), and stacked by different material compositions. The positions of the characteristic FTIR bands of the polymers structural elements are presented in Table 2.  
For the pDVB polymers prepared with the use of toluene or the alcohol mixture, no significant differences can be observed. The superimposed plots overlap with good accuracy. The most intense bands in the fingerprint range are due to out-of-plane ring deformation vibrations (\(\gamma\)(ArH) and \(\gamma\)(Ar) at about 706, 794, 831 and 900 cm\({}^{-1}\)). Above this region, medium intensity bands are caused by stretching vibrations of the aromatic system \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Pore-Forming Diluent**} & \multirow{2}{*}{**Copolymer**} & \multicolumn{4}{c}{**Stretching Vibrations [cm\({}^{-1}\)]**} \\ \cline{3-6}  & & & & & \\ \hline \multirow{4}{*}{toluene} & pDVB t & 1596; 793; 706 & 2922 & - & - \\  & DVB-GMA 2:1 t & 1597; 796; 708 & 2926 & 1249; 905; 837 & 1726; 1187; 1110 \\  & DVB-GMA 1:1 t & 1597; 797; 709 & 2929 & 1251; 905; 840 & 1725; 1184; 1114 \\  & DVB-GMA1:2 t & 1597; 798; 710 & 2932 & 1249; 905; 841 & 1724; - ; 1122 \\ \hline \multirow{4}{*}{decanol and benzyl alcohol} & pDVB db & 1598; 794; 707 & 2922 & - & - \\  & DVB-GMA 2:1 db & 1596; 796; 707 & 2826 & 1248; 903; 837 & 1724; 1189; 1106 \\ \cline{1-1}  & DVB-GMA 1:1 db & 1596; 796; 706 & 2928 & 1248; 903; 838 & 1722; 1187; 1110 \\ \cline{1-1}  & DVB-GMA 1:2 db & 1596; 798; 707 & 2929 & - ; 904; 839 & 1720; 1183; 1119 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Assignment of the FTIR bands in the spectra of the studied polymers [20]. Figure 2: The ATR FTIR spectra of synthesized polymers for both applied pore-forming systems: toluene (t) and a mixture of benzyl alcohol and decanol (db). (\(\
u_{\rm s}\) and \(\
u_{\rm as}\) from 1625 to 1430 and \(\
u\)(ArH) 3100 to 3000 cm\({}^{-1}\)) and aliphatic C-H bonds (\(\
u_{\rm s}\) and \(\
u_{\rm as}\) from 3000 to 2800 cm\({}^{-1}\)). The only difference concerns the relative ratio of two bands intensities, that at 900 and 830 cm\({}^{-1}\). In the case of the pDVB t, their intensities are the same, while in pDVB db the former is more intense than the latter. The wavenumber of 900 cm\({}^{-1}\) can also be assigned to =CH\({}_{2}\) out-of-plane deformation vibration in vinyl group. This observation leads to the conclusion that in the structure of pDVB db there are still unreacted vinyl bonds. The more detailed interpretation of the pDVB ATR spectrum can be found in our previous work [21]. In the spectra of DVB-GMA copolymers, characteristic bands of GMA are visible [18]. Their intensities increase as the content of the functional monomer increases. Among them, vibrations of ester and epoxide groups are the most indicative. The formers are located at about 1726 (\(\
u\)(C=O)) and in the range of 1200-1100 cm\({}^{-1}\) (\(\
u_{\rm s}\) and \(\
u_{\rm as}\) (C-O)), with the latter at 1249 (\(\
u_{\rm s}\) (C-O of epoxide ring)), 905 and 836 cm\({}^{-1}\) (\(\delta_{\rm s}\) and \(\delta_{\rm as}\) (epoxide ring)). Despite the chemical similarity of these materials, some differences can also be noted. They are the most pronounced for the polymers where GMA predominates (DVB-GMA 1:2) and concern the presence or absence of some bands or changes in their intensities, especially in the range of 1500 to 950 cm\({}^{-1}\).