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Likewise, the XRD patterns in Figure 3c show that, for
the samples synthesized with an initial MPTMS molar
ratio of 0.20, longer TEOS prehydrolysis times yield
products with increased mesoscopic order. These data
indicatethat, in thepresenceof TEOS, low organosilane
concentrations are required toform ordered mesophase
materials, apparently becauseof comparablesolubilities
of the respective PEO-PPO block copolymer moieties
in organosilanes, which act as cosolvents that prevent
nanophase separation.
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