Open AccessEffect of the in-situ polymerized polyurethane on laminated epoxy adhesive / aramid fabrics composites
Author(s) -
Lv Lei,
Rui He
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/733/1/012027
Subject(s) - epoxy , materials science , composite material , adhesive , aramid , polyurethane , prepolymer , composite number , curing (chemistry) , brittleness , polymerization , composite epoxy material , polymer , fiber , layer (electronics)
In order to avoid the high brittleness of epoxy resin and the low peeling strength of its laminated composite, polyurethane was synthesized by in-situ polymerization in epoxy adhesive system. The results of IR, SEM and mechanical properties test showed that the peel strength and shear strength of laminated epoxy adhesive / aramid fabrics composites reached the optimum value when the molar ratio of NCO/OH was 1.2, the content of MoCA curing agent was 1.5% and the content of polyurethane prepolymer was 20%. The brittleness of epoxy resin was reduced to a certain degree, and the bonding properties of epoxy adhesive/aramid fabrics composites were improved.