Sequential IPNs Based on Polyurethane and Styrene-Divinylbenzene Copolymer

Sequential IPNs Based on Polyurethane and Styrene-Divinylbenzene Copolymer 

The full similarity of the main diffraction maxima on curves 1 and 2 (Fig. 22) shows that introduction of small amounts of copolymer in a PU 

The comparatively small level of scattering for IPNs favors the studies of the heterogeneous structure of IPNs containing even small amounts of the second network. The increasing intensity for IPNs as compared with the additive values for pure components proves the nonhomogeneous distribution of PU and copolymer throughout the volume of the system. The conclusion can 

For the same system the change of SAXS pattern was studied at various stages of styrene-DVB copolymerization. For these systems the parameters of heterogeneous structure calculated from SAXS data are presented in Table 3 [88]. They were determined on the basis of difference curves that were obtained by subtracting additive values of intensities of pure components from the values of small-angle intensities of IPNs. 

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