| 摘要 |
<p>The invention concerns a novel method for preparing mesomorphic polyborazylene which is particularly interesting in that starting with an appropriate polyborazylene, it results very quickly, almost instantaneously and in a manner which can be reproduced with high efficacy, in a quality product. Moreover its implementation is simple and consists in obtaining polyborazylene by polycondensation of borazine in closed reactor and adding a solvent selected among the aromatic borazine solvents and their mixtures, to said polyborazylene obtained by polycondensation. The invention also concerns the mesomorphic polyborazylene, which is novel by being in the presence of a particular solvent and/or by its own quality. The invention further concerns the use of said polyborazylene of the invention and/or prepared as per the invention, as precursor of boron nitride.</p> |
