Synthesis Of Ladderlike Polymethylsilsesquioxane By H-Bongding Self-Assembling Template

Research in microstructure-controllable ladderlike polymer is the advanced and interdisciplinary study for polymer science, supramolecular chemistry and material science. The synthesis of reactive ladderlike polysiloxane is one of the most challenging tasks, from which a series of novel functional ladderlike polysiloxane can be prepared.The paper of this dissertation improved the regularity of ladderlike polysiloxane through strong H-bonding template and slowly dropping water for hydrolysis and condensation. Synthesis of well-defined and functional polymethylsiloxane (CH₃-OLPS) with reaction groups: the peak of [CH₃(NH)SiO_2/2 ] with the half-peak width is about below 0．5 ppm in ²⁹ Si NMR spectrum. Pure inorganic ladderlike polymethylsilsequioxane (CH₃-T) was prepared by the way of subsection hydrolysis. The peak of-SiO_3/2 with the half-peak width below 3．0 ppm. The data show that the polymer has ordered ladderlike molecular structure.N-chlorophenyl adamantaneformylamide was synthesized by the reaction of adamantine. The total yield was 83．3%. The structure was characterized by IR and 1H-NMR and the effect of medium polarity such as acetonitrile, acetone, dichloromethane, toluene on yield was discussed during the amination. The experimental results showed that the lower medium polarity was, the higher yield was. A novel kind of ladderlike polysiloxane with side-chain was designed through "Stepwise Coupling Polymerization". The obtained ladderlike polymer has promising application in NLO materials, alignment layer in liquid crystal display. This synthetic method paves another a new way for synthesis and functionalization of novel ladderlike polymers.