Effect of block copolymer concentration and core composition on toughening epoxies

Innovative materials of this era for toughening the epoxy matrix: A review

“…Deformation and scattering experiments have confirmed the two relevant ideas for our discussion that are cavitation in rubbery nano domains and lack of void formation in epoxies modified with glassy core micelles . However, in a previous paper Redline et al reported that micelle core cavitation is not a necessary condition for toughening, as glassy core micelles also toughened epoxies, despite their inability to cavitate. It is important to note that the origin of toughness in epoxies modified with glassy core micelles are fundamentally different from the toughening mechanism in epoxies modified with other rigid particles.…”

“…Grafting of nanofillers onto the BCPs is quite interesting as well as tedious. Normally in “grafting to” technique initially the polymer chains are created and eventually they are affixed with the functional groups with the aromatic surface of GO [75, ]. Various methods used for executing this type of approach include straight covalent bond formation with the functional polymers on the surface of GO using esterification, amidation, click chemistry, nitrene chemistry, radical addition, and so forth.…”

The change in the environment of the immiscible block stabilizes an unexpected HPC phase in a cured block copolymer/epoxy blend

“…Block copolymer (BCP)/epoxy blends have been the subject of a large number of recent studies where the focus was placed on the role of the BCP as a processing aid [1,2], as a template for the self-assembly of different type of nanoparticles [3][4][5], or as a toughening agent [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The nanostructuration of the BCP in the epoxy matrix requires an immiscible block, either initially [20,21] or during polymerization [22,23], and another block that keeps its miscibility up to high or full conversions.…”

Reaction‐induced phase separation and resulting thermomechanical and surface properties of epoxy resin/poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) blends cured with 4,4′‐diaminodiphenylsulfone

“…The toughness of the epoxy can be improved by the incorporation of a second phase such as functionalized rubbers, thermoplastics . or block copolymers (BCP) . Of these, toughening by the incorporation of BCPs has attracted great research interest recently, particularly because this method facilitates the generation of various ordered and disordered nanostructures in the epoxy matrix due to either by self‐assembly or reaction induced phase separation (RIPS).…”