Disiloxane diacetylene polymer

To produce elastomeric materials from 95, Kolel-Veetil and Keller studied the effects of reducing the concentration of the diacetylene units in 95 on the plasticities of the resulting networks.127 The ratio (1 2 1) of the carborane, disiloxane, and diacetylene moieties in 95 was altered to 2 3 1, 4 5 1, and 9 10 1, respectively, to produce polymers containing progressively lower amounts of diacetylene units. Two sets of the polymers, one an alternating type (97) and the other a blocky type (98) (Fig. 60), were synthesized. The networked polymers produced from both the blocky and the alternating sets were found to be slightly elastomeric with T values around... 

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