Effect of Polyethersulfone on the Mechanical and Rheological Properties of Polyetherimide-Modified Epoxy Systems

Abstract

The reaction-induced phase separation process of polyethersulfone-and polyetherimide-modified (PES-and PEI-modified) epoxy systems was investigated by using transmission electronic microscopes (TEM) and a rheometry instrument. The morphologies of cured blends alter considerably with the PES content and molecular weight at the same content of total thermoplastics. Compared with the PEI-modified systems, many complex phase separation mechanisms are observed due to the introduction of PES, but similar relationships between melt viscosity change behaviors and morphology developments are observed in the PES-added ternary systems. Dynamic mechanical analysis (dma) and mechanical studies show that neither heat resistance nor toughness of the resultant blends is obviously influenced by the addition of PES.

Fabrication and evaluation of structural film adhesive using oxazolidinone modified novolac epoxy resin

“…Oxazolidinone ring system plays a pivotal role in engineering materials due to their exceptional mechanical and thermal attributes . Several studies were also reported related to polyethersulfone (PES) toughened cured epoxy network and their toughening mechanism …”

Synergistic effects of thermoplastic and nanoclay on the performance properties and morphology of epoxy resin

“…Furthermore, several investigations were conducted on the successful improvement of epoxy resin mechanical properties by using layered nanoclays [5,[9][10][11][12] or thermoplastics modifiers [13][14][15][16][17][18]. In recent years, layered nanoclays such as montmorillonite were also combined with thermoplastics such as poly(methyl methacrylate) (PMMA) to enhance the properties of epoxy resin.…”

Polymerization-induced phase separation in polyethersulfone modified epoxy resin systems: effect of curing reaction mechanism

“…As a result, much work has been made to toughen highly crosslinked thermosetting polymers with high modulus, high glass transition temperature thermoplastics, such as polyethersulfone (PES) [1,2] , polysulfone (PSF) [3] , poly (ether ether ketone) (PEEK) [4] and polyetherimide (PEI) [5,6] . Since the mechanical properties of the materials are determined by their final morphologies, much work has been focused on mechanism study of phase separation and morphology control [7][8][9][10][11][12][13] . Effective improvement in toughness can only be obtained at high fractions of the engineering thermoplastic [14,15] , where the thermoplastic forms a continuous phase with the epoxy spherical domain, or the thermoplastic and epoxy form a bicontinuous phase structure.…”