Nechausov, S. S. published the artcileDual-curing propargyl/phthalonitrile monomers for composites by vacuum infusion process, Category: nitriles-buliding-blocks, the main research area is propargyl phthalonitrile monomer vacuum curing.
Four different bifunctional monomers were synthesized: two monomers containing N-propargylamine and phthalonitrile groups and two monomers containing O-propargyl ester and phthalonitrile groups. It was shown that only the latter one can be used to obtain composite materials by vacuum infusion (viscosity 40 mPa*s at 120°C). The N-propargylamine containing monomers demonstrated high viscosity of the melts and degradation with allene evolution while curing. Carbon fiber reinforced plastics (CFRP) were successfully obtained from 4-[3-(prop-2-yn-1-yloxy)phenoxy]benzene-1,2-dicarbonitrile by a vacuum infusion molding process. Mech. testing of the composites samples was performed. Influence of end-curing temperature on mech. properties and morphol. of composites was investigated. The curing temperature of 375°C critically affects the properties of the composite due to the high shrinkage. Composites cured at 375°C lost 18% of mech. properties at 300°C but cured at 330 only 10%. LOI for composites with a matrix of propargyl/phthalonitrile dual-curing polymers was equal to 75, which is higher than most materials obtained from thermosets.
IOP Conference Series: Materials Science and Engineering published new progress about Composites. 91-15-6 belongs to class nitriles-buliding-blocks, name is Phthalonitrile, and the molecular formula is C8H4N2, Category: nitriles-buliding-blocks.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts