Boron-containing polymers preceramic

Boron-containing nonoxide amorphous or crystalline advanced ceramics, including boron nitride (BN), boron carbide (B4C), boron carbonitride (B/C/N), and boron silicon carbonitride Si/B/C/N, can be prepared via the preceramic polymers route called the polymer-derived ceramics (PDCs) route, using convenient thermal and chemical processes. Because the preparation of BN has been the most in demand and widespread boron-based material during the past two decades, this chapter provides an overview of the conversion of boron- and nitrogen-containing polymers into advanced BN materials. 

This chapter focuses on the description of boron-containing preceramic polymers, which are currently used for the preparation of complex shapes and have been... 

Non-oxide preceramic polymers which are expected to yield, under convenient thermal and chemical conditions, boron-containing amorphous or crystallized ceramics including boron nitride (BN), boron carbide (B C), boron carbonitride (B-C-N), and boron silicon carbonitride Si-B-C-N. 

The purpose of this chapter is to provide an overview of the chemistry, processing and application of boron-containing preceramic polymers in the BN system. The nonoxide precursor route, also called the Polymer Derived Ceramics (PDCs) route, represents a chemical approach based on the use of air- and/or moisture-sensitive (molecular or polymeric) precursors by means of standard Schlenk techniques and vacuum/argon lines. This precursor route allows the chemistry (e.g., elemental composition, compositional homogeneity and atomic architecture) of molecular precursors to be controlled and tailored in order to provide the ensuing preceramic polymers... 

This chapter will be divided into three parts corresponding to the 3 main class of boron-containing preceramic polymers which are used for BN preparation (1) poly-borazylene and other polymers derived from borazine (2) poly[B-ami-... 

A somewhat unconventional access to preceramic polymers containing silicon and boron has been reported by Schmidt et al. A borazine polymer and a silazane polymer are separately synthesized and dissolved in toluene, and then mixed together. The subsequent crosslinking of the borazine with the silazane components proceeds through hydrogen elimination and transamination reactions [54]. 

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