Study on phenolphthalein poly(ether sulfone)‐modified cyanate ester resin and epoxy resin blends

Abstract

In this work, the phenolphthalein poly(ether sulfone) (PES‐C)‐modified cyanate ester (CE) and epoxy (EP) blends were prepared. This work mainly discusses the curing behaviors, fracture toughness, dynamic mechanical properties, and thermal and mechanical properties of the blends. The Fourier transform infrared and differential scanning calorimetric analyses are used to confirm the curing behaviors, demonstrating that the main reaction pathways are not varied with the addition of PES‐C, but the reaction rate could be evidently accelerated. The fracture morphologies of the blends are observed by Scanning electron microscope (SEM) and the fracture causes of the failed surface are also analyzed. With the addition of PES‐C, the modified blends display higher fracture toughness (KIc) and impact strength when compared with neat CE. Domain sizes of the blends first increase then decrease with the addition of PES‐C. The results of dynamic mechanical analysis and thermogravimetric analysis show that the Tg, storage modulus, and thermal stability of the crosslink network slightly decreases with the addition of PES‐C. The mechanical strength of blends with the addition of PES‐C is far better than that of the blends without PES‐C both at ambient temperature and elevated temperature. POLYM. ENG. SCI., 55:2591–2602, 2015. © 2015 Society of Plastics Engineers

Micromorphology and Mechanical and Dielectric Properties of Bismaleimide Composite Modified by Multiwalled Carbon Nanotubes and Polyethersulfone

“…The cross-section surface of PES-MABE had obvious microcracks, and the fracture was ductile; the main reason was that the PES phase evenly dispersed in continuous MABE phase and the interaction between two phases was strong. The material would crack along the direction of the force when the composite suffered external force; a great number of microcracks formed as the interface function between two phases combined well and played a role of toughening effects [20,21]. The formation of microcracks and shear zone could absorb a quantity of energy and cause a ductile fracture.…”

Influence of backbone structure, conversion and phenolic co-curing of cyanate esters on side relaxations, fracture toughness, flammability properties and water uptake and toughening with low molecular weight polyethersulphones

“…However, for their use as matrix resins for structural composites an increase in toughness would still be required. High-T g amorphous thermoplastics (TPs) have been shown to toughen cyanate esters [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Commercial types of polysulphone or polyetherimide can be used, but due to the high molecular weight of all commercial TPs, this is at the expense of a large increase in viscosity of the cyanate-TP blend.…”

Ameliorated Mechanical and Dielectric Properties of Heat-Resistant Radome Cyanate Composites

“…Transmittance materials are primarily applied in radome manufactures to ensure that the antenna device system operates smoothly in remote control and communications, resisting the mechanical, thermal, electrical, and chemical impacts in harsh environments. The stealth function required for recently progressive radomes has been achieved by coordinating the diversified characteristics of wave-absorption at high frequencies and wave-transmission at low frequencies, which is intriguing for developing next-generation transmittance materials [ 1 , 2 , 3 ]. At present, the wave-transmission materials used for fabricating radomes are mainly composed of ceramics and resins.…”