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Synthesis of poly(borazinylamine)
Author(s) -
Zeng Qingbing
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990808)73:6<863::aid-app2>3.0.co;2-k
Subject(s) - boron trichloride , cyclohexane , yield (engineering) , solvent , polymer chemistry , ceramic , thermal decomposition , solubility , polymer , materials science , boron , hydrolysis , nuclear chemistry , chemistry , decomposition , chemical engineering , organic chemistry , composite material , engineering
1,3,5‐Trichloroborazine (TCB) was prepared from the reaction of ammonia chloride with boron trichloride. TCB along with hexamethyldisilazane and boron trichloride were used to synthesize boron nitride (BN) preceramic polymer poly(borazinylamine). This study showed that, the lower the reaction temperature, the higher the synthetic yield. Poly(borazinylamine)'s solubility mainly depended on the ratio of TCB, (Me 3 Si) 2 NH, and BCl 3 . The solvent used in the reaction had a large effect on the ceramic yield of poly(borazinylamine). A soluble poly(borazinylamine) with good synthesis and ceramic yields was obtained when the reaction temperature was −15°C, cyclohexane was the solvent, and the ratio of TCB : (Me 3 Si) 2 NH : BCl 3 was 1 : 6 : 1. By means of infrared and mass spectroscopy analyses, the structure of the poly(borazinylamine) was identified. Thermal decomposition of the poly(borazinylamine) precursor to hydrolyzed BN was also examined. Hydrolyzed BN was obtained at 1000°C, where the ceramic yield was 35–45%. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 863–868, 1999