Results 161 to 170 of about 3,266 (209)
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Polyfunctional cyanate esters for preparing composite materials
Russian Journal of Applied Chemistry, 2014Reaction of a polyfunctional cyanate ester with an epoxy oligomer was studied. A procedure for preparing a binder for composite materials by the solvent-free prepreg technology was developed, studied, and optimized. Curing of this binder occurs without release of by-products and leads to the formation of a heat-resistant polymeric matrix.
R. R. Mukhametov +3 more
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Development of Bismaleimide/Cyanate Ester Copolymers
2001Since the beginning of the space age, the goal of materials development in the aerospace industry has been to replace metal alloys with much lighter polymer resins, while maintaining the strength over a wide temperature range characteristic of metals.
BC Sisk, K Chuang, W-P Pan
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Cyanate Esters - High Performance Resins
1986Cyanate esters of poly phenolic compounds were first prepared by E.Grigat in the early 1960’s. The crystalline, highly pure monomers were made by reacting phenols with cyanogen halide in the presence of a base. Cyanate esters, like isocyanates, undergo a number of interesting reactions which lead to thermoset polymers.
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Frontal polymerization of a cyanate ester
Journal of Applied Polymer Science, 2012AbstractThermal frontal polymerization is an exothermic process that uses a propagating wave to polymerize monomers via an external heat source, such as a soldering iron, to initiate front propagation. Herein, for the first time, the curing of a cyanate ester via thermal frontal polymerization is described with two different external heat sources ...
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A novel cyanate ester resin/microcapsules system
Polymer Composites, 2008AbstractPoly(urea‐formaldehyde) microcapsules filled with epoxy resins(MCEs) were applied to bisphenol A dicyanate ester (BADCy) resin to develop a novel BADCy/MCEs system. The effects of MCEs on the viscosity and the reactivity of BADCy were investigated. The mechanical properties and the hot water resistance of cured BADCy/MCEs systems were evaluated.
Li Yuan, Aijuan Gu, Guozheng Liang
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Nickel-Catalyzed Cyanation of Benzylic and Allylic Pivalate Esters
The Journal of Organic Chemistry, 2018A nickel-catalyzed cyanation reaction of benzylic and allylic pivalate esters is reported using an air-stable Ni(II) precatalyst and substoichiometric quantities of Zn(CN)2. Alkene additives were found to inhibit catalysis, suggesting that avoiding β-hydride elimination side reactions is essential for productive catalysis.
Nicholas W. M. Michel +3 more
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Cure monitoring of catalysed cyanate ester resins
Polymer International, 2000The cure behaviour of two bisphenol A-based cyanate ester resins, AroCy B10 and B30, catalysed by copper acetylacetonate and nonylphenol was studied. For this purpose, differential scanning calorimetric (DSC) and rheological measurements were carried out at temperatures between 130 and 170 °C.
Isabel Harismendy +3 more
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Circuit World, 1993
Thermal cycling tests and failure modelling were conducted on FR‐4 and cyanate ester printed circuit board (PCB) substrate materials to evaluate reliability limits tor solder and repair processes, particularly for high pin count, through‐ hole devices. The boards used were double‐sided, 0.125 in. thick with 0.029 in. diameter plated‐through holes (PTHs)
F. Fehrer, G. Haddick
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Thermal cycling tests and failure modelling were conducted on FR‐4 and cyanate ester printed circuit board (PCB) substrate materials to evaluate reliability limits tor solder and repair processes, particularly for high pin count, through‐ hole devices. The boards used were double‐sided, 0.125 in. thick with 0.029 in. diameter plated‐through holes (PTHs)
F. Fehrer, G. Haddick
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Hydrolysis and blistering of cyanate ester networks
Journal of Applied Polymer Science, 1997The hydrolysis of a cyanate ester network made from the monomer 2,2*- bis(4-cyanatophenyl)isopropylidene (bisphenol A dicyanate homopolymer) was stud- ied. Hydrolysis reactions were performed isothermally at temperatures from 150 to 1807C under conditions of excess water. The kinetics of the reaction were characterized by the decrease in Tg as measured
Leo J. Kasehagen +3 more
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Composites Science and Technology, 2014
Abstract Electronic conductor/polymer composites with high dielectric constant have great potential in many cutting-edge fields, but they usually show high dielectric loss. Here, new composites (MWCNT/CE–5.0EG/CE) were prepared by superposing a multi-wall carbon nanotube (MWCNT)/cyanate ester (CE) composite layer with another expanded graphite (EG ...
Binghao Wang +4 more
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Abstract Electronic conductor/polymer composites with high dielectric constant have great potential in many cutting-edge fields, but they usually show high dielectric loss. Here, new composites (MWCNT/CE–5.0EG/CE) were prepared by superposing a multi-wall carbon nanotube (MWCNT)/cyanate ester (CE) composite layer with another expanded graphite (EG ...
Binghao Wang +4 more
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