| 摘要 |
The aim of the present invention is a process for manufacturing boron nitride fibres, in particular continuous boron nitride fibres with good mechanical properties, which may be used for producing ceramic composite materials such as BN/BN composites, thermostructural parts or antenna radomes. It provides and uses a precursor polymer of formula (I) below: in which n is a whole number, R<1 >and R<2>, identical or different, represent independently an alkyl group, and R<3 >represents an amino group, a hydrogen atom, an alkyl, a cycloalkyl or a boryl.
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