Poly 7?- borazine-derived

B. tris(2 -Alkylamino)borazine-Derived Poly Z -(alkylamino)borazines]... 

Hydrogels and amphiphilic membranes Poly(carbophosphazenes) and poly(thiophosphazenes) New condensation syntheses NLO and high refractive index polymers Microencapsulation of mammalian cells (PCPP) Polyphosphazene polymer blends and IPN s Borazine derivatives Poly(phosphazophosphazenes)... 

Abstract - Studies of the syntheses, properties and ceramic conversion reactions of the new processable borazine-derived polymer systems, poly(vinylborazine), poly(vinylborazine/styrene) and poly(borazylene), along with selected applications of these polymer precursors for the formation of boron nitride ceramics are described. 

By analogy with B-trialkylaminoborazi ne and polyborazine derived therefrom, the first route envisioned to poly(borylaminoborazine) was the thermal condensation of molecular precursors under a convenient atmosphere. As detailed earlier the innovative idea behind this procedure is to tailor the polymeric precursor structure by increasing the distance between the two borazinic rings. For that purpose, we explored... 

Borazine is isoelectronic and isostructural with benzene. Poly(borazylene), a polymer of borazine and its derivatives, is reported extensively as a precursor of BN-coated ceramic libers.86 Polymeric borazine oxide derivative is claimed to be flame resistant (Figure 9.10).87... 

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-... 

It has been confirmed that the presence of bridge-type bonds in such poly (B-alkylaminoborazines) confers flexibility and an inaeased melt-spirmability, thus leading to the conclusions that melt-spinnability inaeases from 1- to 4-daived polymers. In addition, the ceramic yield is reduced with the increased proportion of -NlCHj) in the B-(alkylamino)borazine leading to important shrinkages during the furlha- polymer-to-ceramic conversion of green fibers derived therefrom. Hence, it is relevant to assume... 

A poly(aminoborazine), precursor for hexagonal boron nitride obtained by reaction of borazine B3N3H6 with ammonia, and its pyrolysis derivatives have been extensively characterised by and B MAS NMR. ... 

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