A high-performance polycyanurate network derived from 4,4′-biscyanato-2,2′-trifluoromethylbiphenyl

Cyanate Ester Monomers and Oligomers. Overview of the Modern Research State and Perspectives

A hybrid cyanate ester resin containing polysilazane was prepared via the prepolymerization of bisphenol-A dicyanate ester monomer (BADCy) in the presence of polysilazane (PSZ) under low temperatur...

Preparation of hybrid cyanate ester resin in the presence of polysilazane and its properties

An experimental study was made on p-tert-Butylcalixarene separation and enrichment of Cr(Ⅲ) and Cr(Ⅵ) compounds.The experimental results show that p-tert-Butylcalix[4]arene can well separate and enrich Cr(Ⅲ) in the circumstances of pH=6 and 1mol/L HCl as elution solvent.Common ions in water affect little on the process of enrichment and separation.The enrichment content of Cr(Ⅲ) is 3.3×10~3 μg/g.The p-tert-Butylcalix[4]arene is applied to environmental water sample and the recovery rate of Cr(Ⅲ) is more than 90.0%.The result is satisfactory.Meanwhile the experimentation indicated Ptert-Butylcalix[4]arene can not enrich Cr(Ⅵ) compound.

P-tert-Butylcalix[4]Arene Separation and Enrichment of Cr(III) and Cr(VI)

p-tert-Butylcalix[4]arene-derived cyanate ester resins, both single and binary systems, were synthesized and studied for their thermal properties. The results showed that pure calixarene cyanate es...

Calixarene–based cyanate ester resin for high-temperature material:

The invention belongs to the technical field of synthesis of cyanate type compounds and relates to a preparation method of a fluorine-containing cyanate monomer. The method comprises the following steps: step 1, adding a solvent and cyanogen halide; stirring to completely dissolve the cyanogen halide; step 2, under violent stirring, slowly dropwise adding triethylamine and a solution of a fluorine-containing bisphenol compound, wherein the dropwise adding speed of the triethylamine is slightly smaller than the dropwise adding speed of the fluorine-containing bisphenol compound; controlling thereaction temperature to be -20 to 0 DEG C; finishing dropwise adding after 2 to 10 h; then continually stirring for 1 to 3 h and stopping reaction; step 3, after standing for 1 to 5 h, filtering to obtain a fluorine-containing bisphenol cyanate resin crude product and then purifying. The invention provides the method for synthesizing the fluorine-containing cyanate monomer so that the preparationof the fluorine-containing cyanate monomer becomes possible.

Su Tao

Papers

Calixarene–based cyanate ester resin for high-temperature material:

Preparation method of fluorine-containing cyanate monomer