Ionic cross-linked methacrylic copolymers for carbon fiber reinforced thermoplastic composites

Abstract

Methacrylic copolymers have high potential as matrix polymers for carbon fiber reinforced thermoplastics (CFRTPs) due to their superior mechanical properties and the versatility of the monomers. However, the methacrylic copolymers have low solvent resistance, compared to epoxy, polyamide, and polypropylene, due to their un-cross-linked amorphous structure. Therefore, an improvement of the solvent resistance by the introduction of metal salts into methacrylic copolymer matrices for CFRTPs was investigated. Infrared spectroscopy, dynamic mechanical analyses and small-angle X-ray scattering clarified that an ionic cross-linked structure was formed. Low-viscosity mixtures of the methacrylic monomers with the metal salts, as a precursor of the matrices for CFRTPs, were easily impregnated into CF fabrics and were then copolymerized within the CF fabrics. Both the flexural strength and shear adhesive strength of the CFRTPs using the in situ polymerized methacrylic ionomer cross-linked with sodium ions were sufficiently high, even after 12 h immersion in methyl ethyl ketone.

Effect of γ‐ray irradiation on epoxy network polymers with different curing agents

“…Epoxy resins are often used as matrix polymers in fiber‐reinforced composites for applications in synchrotron radiation facilities and space engineering. The most fundamental mechanical properties for matrix polymers in fiber‐reinforced composites are the elastic modulus and the adhesion to fibers 35–37 . The elastic modulus of the cured epoxy polymers at 23°C was evaluated in relation to the γ‐ray irradiation dose (Figure 2).…”

“…The most fundamental mechanical properties for matrix polymers in fiber-reinforced composites are the elastic modulus and the adhesion to fibers. [35][36][37] The elastic modulus of the cured epoxy polymers at 23 C was evaluated in relation to the γ-ray irradiation dose (Figure 2). The flexural modulus of the DDM-cured and PN-cured resins at room temperature increased with increasing γ-ray irradiation dose.…”

Effect of Special Plating Films on Galvanic Corrosion Behavior between Metal and CFRTP

“…To realize multi-materials, joining methods such as laser and friction lap joining processes have been developed for joining metallic materials and CFRTP [3,4], but cost reduction of equipment has become an issue. Therefore, we focused on thermo-compression joining through the anchoring effect using surface irregularities of metals as a low-cost joining method between metal and CFRTP.…”

Chelating Silicone Dendrons: Trying to Impact Organisms by Disrupting Ions at Interfaces

“…The self-association of carboxylic acid groups in a silicone environment through hydrogen bonding dramatically increases viscosity and makes the polymers more difficult to process. However, the tunable acidity allows carboxy-modified silicones to be used as constituents of ionic liquids [ 23 ], or ionically crosslinked elastomers ( Figure 1 b) [ 24 , 25 , 26 ].…”