## 3 Results and Discussion
This indicates that the two plots are nearly parallel to each other. This led us to calculate the \(M_{\rm c}\) for the PSt-\(l\)-  
Figure 4: The \(T_{\rm g}\) of the PSt component of PSt-\(l\)-PDMS conetworks (black and light brown) as a function \(1/M_{\rm c}\), and the \(T_{\rm g}\) of PSt homopolymers as a function \(1/M_{\rm n,PSt}\) (green and blue). Data from Refs. [71; 86; 87]. taking into account only the PDMS macrocrosslinker, i.e., by neglecting the DVB, according to Equation (2), and to plot the \(T_{\rm g}\) data as a function of \(1/M_{\rm c}\). The left-hand side plot in Figure 5 includes these data together with that of the PSt-\(l\)-PDMS networks. As can be seen, the two kinds of data overlap, indicating that the determining component for the \(T_{\rm g}\) of PSt in the coneutworks is the amount of the MA-PDMS-MA macrocrosslinker. The DVB, with the applied amount, i.e., DVB/St ratio of \(1/36\ m/m\), does not have a detectable effect on the glass transition behavior in the PSt-\(l\)-PDMS/DVB coneutworks. Figure 6 summarizes the observations presented for the Fox-Flory-type correlation between the \(T_{\rm g}\) and \(1/M_{\rm c}\) for the PSt-\(l\)-PDMS and the PSt-\(l\)-PDMS/DVB coneutworks and the \(T_{\rm g}\) and \(M_{\rm n}\) literature data for polystyrene homopolymers [86; 87]. As this plot indicates, these data show that both the \(1/M_{\rm c}\) and \(1/M_{\rm n,PSt}\) dependence for the coneutworks and PSt homopolymers, respectively, exhibits the same trend, validating the scissors effect of the PDMS macrocrosslinker on the glass transition behavior of PSt in the coneutworks. These findings indicate that the junction points between the PDMS macrocrosslinker and the crosslinked PSt chains significantly interrupt the mobility of the PSt chains, as illustrated in Scheme 3, by displaying the structure of the junction points in the coneutworks. The difference in the chain mobility between the PDMS macrocrosslinker and the crosslinked PSt chains leads to chain segments of PSt with molecular weight of \(M_{\rm c}\) having the same mobility, and thus, glass transition temperature as PSt homopolymers with the same \(M_{\rm n,PSt}\). As a result, the \(T_{\rm g}\) versus \(1/M_{\rm c}\) plot shows Fox-Flory-type dependence. This explanation of the scissors effect by the macrocrosslinker is supported by the results of previous solid-state NMR experiments with poly(N,N-dimethylaminoethyl methacrylate)-\(l\)-polyisobutylene (PDMAEMA-\(l\)-PIB) coneutworks prepared with deuterated methacrylate-ended PIB [92]. As found in this study, the more mobile PIB macrocrosslinker with lower \(T_{\rm g}\) significantly influences the mobility of the crosslinking point, and this results in lower \(T_{\rm g}\) of the PDMAEMA component than that of its homopolymer, similar to the investigated PSt-\(l\) PDMS and PSt-\(l\)-PDMS/DVB coneutworks. Figure 1:0 The glass transition temperature of the PSt component as a function of \(1/M_{\rm c}\) in the PSt-\(l\)-PDMS (black square) and PSt-\(l\)-PDMS/DVB (red and blue circles) coneutworks with \(M_{\rm c}\) values determined by Equation (3) (blue circle) and Equation (2) (red circle and black square). **Scheme 3. ** The structure of the crosslinking point in PSt-\(l\)-PDMS contexts which interrupts the chain mobility of the PSt segments in these macromolecular assemblies and results in the scissors effect by the PDMS macrocrosslinker on the glass transition behavior of the polystyrene component. Figure 1:1 The \(T_{\rm g}\) of the PSt component of PSt-\(l\)-PDMS (black and light brown), PSt-\(l\)-PDMS/DVB (red) contexts as a function \(1/M_{\rm c}\), and the \(T_{\rm g}\) of PSt homopolymers as a function \(1/M_{\rm n,PSt}\) (green and blue). Data from Refs. [71; 86; 87].