Hydrosilated elastomeric network

Figure 15.20 (Top) Schematic representations of the completely hydrosilated elastomeric network from 14 + 4 C-Ls (18) (left) and the partially hydrosilated elastomeric network from 17 + 4 C-Ls (19) (right). (Bottom) DSC thermograms depicting the completely hydrosilated networks from 14 + 4 C-Ls (18) (a), and the partially and completely hydrosilated elastomeric network (19) (b) and (20) (c), respectively, from 17 + 4 C-Ls reported by Kolel-Veetil et al.

Recently, Kolel-Veetil and Keller have modified this system to produce elastomeric networked polymers. The ambient-condition hydrosilation reactions between monomeric vinyl- or ethynyl-terminated carboranylenesiloxane and three different monomeric branched siloxane cross-linkers in hexane yielding these systems were catalyzed by the Karstedt catalyst.134 The reactions involving the vinyl-carboranylenesiloxane were reported to produce a set of completely hydrosilated networked polymers (105) (Fig. 65). In the case of the ethynyl monomer, the reactions were carried out at two different ratios, yielding a partially (106) and a com-... 

In the interest of producing elastomeric network polymers, Kolel-Veetil et al. reported the modification of the preceding hydrosilation reaction system. They reported the Karstedt catalyst-catalyzed ambient-condition hydrosilation reactions of a monomeric vinyl 14 or ethynyl-containing 17 carboranylenesiloxane with three different monomeric branched siloxane crossUnkers in hexane (Figure 15.19) [36]. The reactions involving the vinylcarboranylenesiloxane were reported to... 

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