Synthesis and Function Development of Polysilanes Using Disilane Resources obtained from the Direct Synthesis

点击翻译按钮获取中文摘要

In view of the effective utilization of disilane resources formed as the by-products in the Direct Synthesis of methylchlorosilanes, the present study has been done for the conversion of the disilane fraction into more useful organosilicon polymers and for the development of new functions of the resulting polymers as electronic composite materials (photoresists, organic semiconductors, etc.). Thus, four types of new organosilicon polymers (A-B) were produced and their unique physico-chemical properties were disclosed. Polymers A-B show the characteristic absorption band(s) in 250-330nm region. Irradiations for A-C gave, at the early stage of the reaction, lower molecular weight polymers which, on further reaction, changed to higher molecular weight polymers again. It was found that in the photolyses the polymers generate silylene species, as well as silyl radicals. The aravimetric analyses for A-D showed that polymers serve as ceramic precurs, in which A resulted in the least weight loss, yielding 40-50% of the SiC component. The reactions of A with iodine and m-chloroperbenzoic acid were also investigated, which afforded Si-Si bond scission products and oxidation products,respectively.