## 3 Results and Discussion
The \(M_{\rm c}\) data obtained by these two equations fall in the range of 400-10,500 g/mol, that is, covering a more than one order of magnitude range, as presented in Table 1.  
The \(T_{\rm g}\) data for the PSt-\(l\)-PDMS conetworks prepared with two different MA-PDMS-MA crosslinkers having \(M_{\rm n,PDMS}\) of 4.7 and 22.2 kDa are plotted as a function of \(1/M_{\rm c}\) in Figure 3. Apparently, the \(T_{\rm g}\) data in this plot can be well fitted with a straight line, resulting in a slope of \(K=4.1\times 10^{-4}\,\mathrm{\SIUnitSymbolCelsius}\)/mol and an intercept of \(T_{\rm g\,\omega}=96.8\,\mathrm{\SIUnitSymbolCelsius}\), which agrees well with the \(T_{\rm g}\) of high molecular weight PSt. This linear correlation undisputedly indicates that the \(T_{\rm g}\) of PSt, crosslinked with the PDMS macrocrosslinkers, follows the Fox-Flory relationship when \(M_{\rm c}\) is considered as the variable, according to the following equation:  
\[T_{\rm g}=T_{\rm g,\omega}-\frac{K}{M_{\rm c}} \tag{4}\]  
This means that the polystyrene segments between two crosslinking points in the PSt-\(l\)-PDMS conetworks for their glass transition behave like the corresponding homopolymers with the same average molecular weight. In other words, the MA-PDMS-MA macrocrosslinkers act like scissors from the point of view of glass transition of the crosslinked PSt, as illustrated in Scheme 2. Comparing the \(K\) value obtained for the PSt-\(l\)-PDMS conetworks with that of PSt homopolymers raises some difficulties. As the literature indicates, three different regions can be distinguished in the \(T_{\rm g}\) dependence of PSt on its number average molecular weight (\(M_{\rm n,PSt}\)) [84; 85]. This includes two low molecular weight regions with varying \(M_{\rm n,PSt}\) dependence without sharp boundaries, and a higher molecular weight region with nearly constant \(T_{\rm g}\). Because the \(M_{\rm c}\) region in the investigated PSt-\(l\)-PDMS conetworks lies in the borderline region of the two low molecular weight areas of the PSt homopolymers, only the \(T_{\rm g}\) data of PSt homopolymers from the same molecular weight regions than that of the coneweworlds \(M_{\rm c}\) can be compared. Figure 4 displays the literature \(T_{\rm g}\) of PSt homopolymers [86; 87] as a function of \(1/M_{\rm n,PSt}\) together with the \(T_{\rm g}\) data versus \(1/M_{\rm c}\) of the PSt crosslinked by MA-PDMS-MA. This plot also includes \(T_{\rm g}\) data reported previously for PSt-\(l\)-PDMS conetworks [71]. As can be seen in this figure, the \(T_{\rm g}\) data versus \(1/M_{\rm n,PSt}\) for the PSt homopolymers and the \(T_{\rm g}\) for the PSt in the conetworks as a  
Figure 3: The Fox–Flory plot of the glass transition temperatures (\(T_{\rm g}\)) of the PSt component of the PSt-\(l\)-PDMS conetworks with PDMS macrocrosslinkers containing \(M_{\rm n,PDMS}\) of 4.7 and 22.2 kDa as a function of \(1/M_{\rm c}\). function of \(1/M_{\rm c}\) fit well in the same linear, Fox-Flory-type relationship in this joint plot. This result conclusively verifies the scissors effect of the PDMS macrocrosslinker in the PSt-\(l\)-PDMS conetworks. As displayed in Figure 2B,D, the \(T_{\rm g}\) of PSt in the PSt-\(l\)-PDMS/DVB conetworks exhibits a similar trend to that in the PSt-\(l\)-PDMS conetworks, that is, the \(T_{\rm g}\) decreases with the increasing PDMS macrocrosslinker content by keeping the DVB/St ratio constant at \(1/36\ m/m\). Figure 5 shows the \(T_{\rm g}\) data as a function of \(1/M_{\rm c}\), where \(M_{\rm c}\) is obtained by equation (3). This plot indicates a linear relationship with an intercept of 112.1 \({}^{\circ}\)C, which is significantly higher than that of the \(T_{\rm g}\) of polystyrene with high molecular weight. On the other hand, the slope of the fitted straight line is 4.3 \(\times\) 10\({}^{-4}\)\({}^{\circ}\)C-g/mol, which is close to the value of the slope of the \(T_{\rm g}\) versus \(1/M_{\rm c}\) plot for the PSt-\(l\)-PDMS conetworks prepared without DVB, i.e., 4.1 \(\times\) 10\({}^{-4}\)\({}^{\circ}\)C-g/mol.