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Derivatization of Preformed Polymers to Produce Ceramic Precursors
Author(s) -
Maya Leon
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb06751.x
Subject(s) - transamination , derivatization , pyrolysis , derivative (finance) , boron nitride , borane , ceramic , hydrochloride , polymer , boron , materials science , silylation , chemistry , polymer chemistry , organic chemistry , inorganic chemistry , catalysis , high performance liquid chromatography , financial economics , economics , enzyme
The feasibility of producing derivatized preformed polymers to be used as ceramic precursors was explored. A borane derivative of polyethyleneimine (PEI) was prepared through a transamination reaction involving Me 3 NBH 3 . Higher boron loadings were possible with Me 3 NB 3 H 7 . The borane derivative could be cast into films and produced boron nitride upon pyrolysis. Similarly, polyethyleneimine hydrochloride was converted into the cyanohydroborate derivative through a reaction with NaBH 3 CN. This derivative was also accessible through a transamination reaction. Both materials produced boron nitride upon pyrolysis. Polyallylamine hydrochloride could not be derivatized. Silyl derivatives of PEI were also prepared, but the products obtained afforded low ceramic yields upon pyrolysis.