NEW METHODS FOR PREPARING SILICON-NITROGEN POLYMERS

摘要

Persistent efforts to prepare high-temperature polymers based on silicon-nitrogen frameworks have been hampered by the marked tendency to form cyclic structures instead of linear ones, and by poor yields of poly¬mer obtained from the appropriate intermediates. This report deals with two attempts to overcome these difficulties. In the first, direct polymeriza¬tion was sought at the time the nitrogen atoms were introduced into the framework, in a one-step process. In the other, a new form of polymeriza¬tion by condensation of methoxy groups was attempted. Both procedures gave only limited success, but produced some leads which could be pursued.