Open AccessThe nanoeffeсt in epoxynanocomposites
Author(s) -
И. Д. Симонов-Емельянов,
А. А. Пыхтин
Publication year - 2020
Publication title -
plastičeskie massy
Language(s) - English
Resource type - Journals
ISSN - 0554-2901
DOI - 10.35164/0554-2901-2019-11-12-3-6
Subject(s) - epoxy , materials science , silicon dioxide , nanoparticle , composite material , particle size , nanocomposite , toughness , quartz , silicon , izod impact strength test , particle (ecology) , chemical engineering , nanotechnology , metallurgy , oceanography , geology , engineering , ultimate tensile strength
It was shown that the distribution of silica nanoparticles (silicon dioxide) and the size of inhomogeneities (heterogeneity level) in the epoxy oligomers and epoxy nanocomposites effect on the structure and properties of epoxy composites. It was established that the maximum value of epoxy composites impact strength is achieved only when the particles of the optimal size (~ 150 nm) are formed in their structure from silica nanoparticles of different grades (BS-50, BS-100 and BS-120), sizes and specific surface. The nano effect in dispersed-filled epoxy composites caused by the formation of clusters of silica nanoparticles of size ~ 150-190 nm was discovered and proved for the first time. It is accompanied by an increase in impact strength by ~2 times and proves the high efficiency of nanoparticles for creating impact-resistant plastics. It was shown that monolithic ultrafine particles of powdered quartz (silicon dioxide) with a particle diameter of ~150 nm lead to an increase in the toughness of epoxy composites by only ~20% and are much less efficient than nanoparticles.