Dual-curing propargyl/phthalonitrile monomers for composites by vacuum infusion processстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 мая 2020 г.
Аннотация: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 ℃). 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. Mechanical testing of the composites samples was performed. Influence of
end-curing temperature on mechanical properties and morphology of composites was
investigated. The curing temperature of 375 ℃ critically affects the properties of the composite
due to the high shrinkage. Composites cured at 375 °C lost 18% of mechanical 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.